@article{FiedlerKlieglLindenbergeretal.2005, author = {Fiedler, K. and Kliegl, Reinhold and Lindenberger, Ulman and Mausfeld, Reinhold and Mumendy, A. and Prinz, Wolfgang}, title = {Psychologie im 21. Jahrhundert : eine Ortbestimmung}, issn = {1618-8519}, year = {2005}, language = {de} } @book{HocklKlieglKostaetal.1994, author = {Hockl, Ina and Kliegl, Reinhold and Kosta, Peter and Staudacher, Peter and Weißenborn, J{\"u}rgen}, title = {Linguistics in Potsdam}, editor = {De Bleser, Ria and Burchert, Frank}, publisher = {Univ. Potsdam}, address = {Potsdam}, issn = {1616-7392}, year = {1994}, language = {de} } @misc{RolfsKlieglEngbert2004, author = {Rolfs, Martin and Kliegl, Reinhold and Engbert, Ralf}, title = {Microsaccade orientation supports attentional enhancement opposite to a peripheral cue: Commentary on Tse, Sheinberg, and Logothetis}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57081}, year = {2004}, language = {en} } @article{Kliegl1995, author = {Kliegl, Reinhold}, title = {From presentation time to processing time : a psychophysics approach to episodic memory}, year = {1995}, language = {en} } @misc{HohensteinLaubrockKliegl2010, author = {Hohenstein, Sven and Laubrock, Jochen and Kliegl, Reinhold}, title = {Semantic preview benefit in eye movements during reading: a parafoveal past-priming study}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57203}, year = {2010}, abstract = {Eye movements in reading are sensitive to foveal and parafoveal word features. Whereas the influence of orthographic or phonological parafoveal information on gaze control is undisputed, there has been no reliable evidence for early parafoveal extraction of semantic information in alphabetic script. Using a novel combination of the gaze-contingent fast-priming and boundary paradigms, we demonstrate semantic preview benefit when a semantically related parafoveal word was available during the initial 125 ms of a fixation on the pre-target word (Experiments 1 and 2). When the target location was made more salient, significant parafoveal semantic priming occurred only at 80 ms (Experiment 3). Finally, with short primes only (20, 40, 60 ms) effects were not significant but numerically in the expected direction for 40 and 60 ms (Experiment 4). In all experiments, fixation durations on the target word increased with prime durations under all conditions. The evidence for extraction of semantic information from the parafoveal word favors an explanation in terms of parallel word processing in reading.}, language = {en} } @misc{HohensteinMatuschekKliegl2016, author = {Hohenstein, Sven and Matuschek, Hannes and Kliegl, Reinhold}, title = {Linked linear mixed models}, series = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe}, number = {552}, issn = {1866-8364}, doi = {10.25932/publishup-42828}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-428281}, pages = {15}, year = {2016}, abstract = {The complexity of eye-movement control during reading allows measurement of many dependent variables, the most prominent ones being fixation durations and their locations in words. In current practice, either variable may serve as dependent variable or covariate for the other in linear mixed models (LMMs) featuring also psycholinguistic covariates of word recognition and sentence comprehension. Rather than analyzing fixation location and duration with separate LMMs, we propose linking the two according to their sequential dependency. Specifically, we include predicted fixation location (estimated in the first LMM from psycholinguistic covariates) and its associated residual fixation location as covariates in the second, fixation-duration LMM. This linked LMM affords a distinction between direct and indirect effects (mediated through fixation location) of psycholinguistic covariates on fixation durations. Results confirm the robustness of distributed processing in the perceptual span. They also offer a resolution of the paradox of the inverted optimal viewing position (IOVP) effect (i.e., longer fixation durations in the center than at the beginning and end of words) although the opposite (i.e., an OVP effect) is predicted from default assumptions of psycholinguistic processing efficiency: The IOVP effect in fixation durations is due to the residual fixation-location covariate, presumably driven primarily by saccadic error, and the OVP effect (at least the left part of it) is uncovered with the predicted fixation-location covariate, capturing the indirect effects of psycholinguistic covariates. We expect that linked LMMs will be useful for the analysis of other dynamically related multiple outcomes, a conundrum of most psychonomic research.}, language = {en} } @article{SchadVasishthHohensteinetal.2020, author = {Schad, Daniel and Vasishth, Shravan and Hohenstein, Sven and Kliegl, Reinhold}, title = {How to capitalize on a priori contrasts in linear (mixed) models}, series = {Journal of memory and language}, volume = {110}, journal = {Journal of memory and language}, publisher = {Elsevier}, address = {San Diego}, issn = {0749-596X}, doi = {10.1016/j.jml.2019.104038}, pages = {40}, year = {2020}, abstract = {Factorial experiments in research on memory, language, and in other areas are often analyzed using analysis of variance (ANOVA). However, for effects with more than one numerator degrees of freedom, e.g., for experimental factors with more than two levels, the ANOVA omnibus F-test is not informative about the source of a main effect or interaction. Because researchers typically have specific hypotheses about which condition means differ from each other, a priori contrasts (i.e., comparisons planned before the sample means are known) between specific conditions or combinations of conditions are the appropriate way to represent such hypotheses in the statistical model. Many researchers have pointed out that contrasts should be "tested instead of, rather than as a supplement to, the ordinary 'omnibus' F test" (Hays, 1973, p. 601). In this tutorial, we explain the mathematics underlying different kinds of contrasts (i.e., treatment, sum, repeated, polynomial, custom, nested, interaction contrasts), discuss their properties, and demonstrate how they are applied in the R System for Statistical Computing (R Core Team, 2018). In this context, we explain the generalized inverse which is needed to compute the coefficients for contrasts that test hypotheses that are not covered by the default set of contrasts. A detailed understanding of contrast coding is crucial for successful and correct specification in linear models (including linear mixed models). Contrasts defined a priori yield far more useful confirmatory tests of experimental hypotheses than standard omnibus F-tests. Reproducible code is available from https://osf.io/7ukf6/.}, language = {en} } @misc{HohensteinMatuschekKliegl2017, author = {Hohenstein, Sven and Matuschek, Hannes and Kliegl, Reinhold}, title = {Linked linear mixed models: A joint analysis of fixation locations and fixation durations in natural reading}, series = {Psychonomic bulletin \& review : a journal of the Psychonomic Society}, volume = {24}, journal = {Psychonomic bulletin \& review : a journal of the Psychonomic Society}, publisher = {Springer}, address = {New York}, issn = {1069-9384}, doi = {10.3758/s13423-016-1138-y}, pages = {637 -- 651}, year = {2017}, abstract = {The complexity of eye-movement control during reading allows measurement of many dependent variables, the most prominent ones being fixation durations and their locations in words. In current practice, either variable may serve as dependent variable or covariate for the other in linear mixed models (LMMs) featuring also psycholinguistic covariates of word recognition and sentence comprehension. Rather than analyzing fixation location and duration with separate LMMs, we propose linking the two according to their sequential dependency. Specifically, we include predicted fixation location (estimated in the first LMM from psycholinguistic covariates) and its associated residual fixation location as covariates in the second, fixation-duration LMM. This linked LMM affords a distinction between direct and indirect effects (mediated through fixation location) of psycholinguistic covariates on fixation durations. Results confirm the robustness of distributed processing in the perceptual span. They also offer a resolution of the paradox of the inverted optimal viewing position (IOVP) effect (i.e., longer fixation durations in the center than at the beginning and end of words) although the opposite (i.e., an OVP effect) is predicted from default assumptions of psycholinguistic processing efficiency: The IOVP effect in fixation durations is due to the residual fixation-location covariate, presumably driven primarily by saccadic error, and the OVP effect (at least the left part of it) is uncovered with the predicted fixation-location covariate, capturing the indirect effects of psycholinguistic covariates. We expect that linked LMMs will be useful for the analysis of other dynamically related multiple outcomes, a conundrum of most psychonomic research.}, language = {en} } @article{KlieglHohensteinYanetal.2013, author = {Kliegl, Reinhold and Hohenstein, Sven and Yan, Ming and McDonald, Scott A.}, title = {How preview space/time translates into preview cost/benefit for fixation durations during reading}, series = {The quarterly journal of experimental psychology}, volume = {66}, journal = {The quarterly journal of experimental psychology}, number = {3}, publisher = {Wiley}, address = {Hove}, issn = {1747-0218}, doi = {10.1080/17470218.2012.658073}, pages = {581 -- 600}, year = {2013}, abstract = {Eye-movement control during reading depends on foveal and parafoveal information. If the parafoveal preview of the next word is suppressed, reading is less efficient. A linear mixed model (LMM) reanalysis of McDonald (2006) confirmed his observation that preview benefit may be limited to parafoveal words that have been selected as the saccade target. Going beyond the original analyses, in the same LMM, we examined how the preview effect (i.e., the difference in single-fixation duration, SFD, between random-letter and identical preview) depends on the gaze duration on the pretarget word and on the amplitude of the saccade moving the eye onto the target word. There were two key results: (a) The shorter the saccade amplitude (i.e., the larger preview space), the shorter a subsequent SFD with an identical preview; this association was not observed with a random-letter preview. (b) However, the longer the gaze duration on the pretarget word, the longer the subsequent SFD on the target, with the difference between random-letter string and identical previews increasing with preview time. A third patternincreasing cost of a random-letter string in the parafovea associated with shorter saccade amplitudeswas observed for target gaze durations. Thus, LMMs revealed that preview effects, which are typically summarized under preview benefit, are a complex mixture of preview cost and preview benefit and vary with preview space and preview time. The consequence for reading is that parafoveal preview may not only facilitate, but also interfere with lexical access.}, language = {en} } @article{HohensteinKliegl2014, author = {Hohenstein, Sven and Kliegl, Reinhold}, title = {Semantic preview benefit during reading}, series = {Journal of experimental psychology : Learning, memory, and cognition}, volume = {40}, journal = {Journal of experimental psychology : Learning, memory, and cognition}, number = {1}, publisher = {American Psychological Association}, address = {Washington}, issn = {0278-7393}, doi = {10.1037/a0033670}, pages = {166 -- 190}, year = {2014}, abstract = {Word features in parafoveal vision influence eye movements during reading. The question of whether readers extract semantic information from parafoveal words was studied in 3 experiments by using a gaze-contingent display change technique. Subjects read German sentences containing 1 of several preview words that were replaced by a target word during the saccade to the preview (boundary paradigm). In the 1st experiment the preview word was semantically related or unrelated to the target. Fixation durations on the target were shorter for semantically related than unrelated previews, consistent with a semantic preview benefit. In the 2nd experiment, half the sentences were presented following the rules of German spelling (i.e., previews and targets were printed with an initial capital letter), and the other half were presented completely in lowercase. A semantic preview benefit was obtained under both conditions. In the 3rd experiment, we introduced 2 further preview conditions, an identical word and a pronounceable nonword, while also manipulating the text contrast. Whereas the contrast had negligible effects, fixation durations on the target were reliably different for all 4 types of preview. Semantic preview benefits were greater for pretarget fixations closer to the boundary (large preview space) and, although not as consistently, for long pretarget fixation durations (long preview time). The results constrain theoretical proposals about eye movement control in reading.}, language = {en} } @article{RisseKliegl2011, author = {Risse, Sarah and Kliegl, Reinhold}, title = {Adult age differences in the perceptual span during reading}, series = {Psychology and aging}, volume = {26}, journal = {Psychology and aging}, number = {2}, publisher = {American Psychological Association}, address = {Washington}, issn = {0882-7974}, doi = {10.1037/a0021616}, pages = {451 -- 460}, year = {2011}, abstract = {Following up on research suggesting an age-related reduction in the rightward extent of the perceptual span during reading (Rayner, Castelhano, \& Yang, 2009), we compared old and young adults in an N + 2-boundary paradigm in which a nonword preview of word N + 2 or word N + 2 itself is replaced by the target word once the eyes cross an invisible boundary located after word N. The intermediate word N + I was always three letters long. Gaze durations on word N + 2 were significantly shorter for identical than nonword N + 2 preview both for young and for old adults, with no significant difference in this preview benefit. Young adults, however, did modulate their gaze duration on word N more strongly than old adults in response to the difficulty of the parafoveal word N + I. Taken together, the results suggest a dissociation of preview benefit and parafoveal-on-foveal effect. Results are discussed in terms of age-related decline in resilience towards distributed processing while simultaneously preserving the ability to integrate parafoveal information into foveal processing. As such, the present results relate to proposals of regulatory compensation strategies older adults use to secure an overall reading speed very similar to that of young adults.}, language = {en} } @article{RisseHohensteinKliegletal.2014, author = {Risse, Sarah and Hohenstein, Sven and Kliegl, Reinhold and Engbert, Ralf}, title = {A theoretical analysis of the perceptual span based on SWIFT simulations of the n+2 boundary paradigm}, series = {Visual cognition}, volume = {22}, journal = {Visual cognition}, number = {3-4}, publisher = {Routledge, Taylor \& Francis Group}, address = {Abingdon}, issn = {1350-6285}, doi = {10.1080/13506285.2014.881444}, pages = {283 -- 308}, year = {2014}, abstract = {Eye-movement experiments suggest that the perceptual span during reading is larger than the fixated word, asymmetric around the fixation position, and shrinks in size contingent on the foveal processing load. We used the SWIFT model of eye-movement control during reading to test these hypotheses and their implications under the assumption of graded parallel processing of all words inside the perceptual span. Specifically, we simulated reading in the boundary paradigm and analysed the effects of denying the model to have valid preview of a parafoveal word n + 2 two words to the right of fixation. Optimizing the model parameters for the valid preview condition only, we obtained span parameters with remarkably realistic estimates conforming to the empirical findings on the size of the perceptual span. More importantly, the SWIFT model generated parafoveal processing up to word n + 2 without fitting the model to such preview effects. Our results suggest that asymmetry and dynamic modulation are plausible properties of the perceptual span in a parallel word-processing model such as SWIFT. Moreover, they seem to guide the flexible distribution of processing resources during reading between foveal and parafoveal words.}, language = {en} } @article{HohensteinKliegl2010, author = {Hohenstein, Sven and Kliegl, Reinhold}, title = {Semantic preview benefit in eye movements during reading : a parafoveal fast-priming study}, issn = {0278-7393}, doi = {10.1037/A0020233}, year = {2010}, abstract = {Eye movements in reading are sensitive to foveal and parafoveal word features. Whereas the influence of orthographic or phonological parafoveal information on gaze control is undisputed, there has been no reliable evidence for early parafoveal extraction of semantic information in alphabetic script. Using a novel combination of the gaze- contingent fast-priming and boundary paradigms, we demonstrate semantic preview benefit when a semantically related parafoveal word was available during the initial 125 ms of a fixation on the pretarget word (Experiments 1 and 2). When the target location was made more salient, significant parafoveal semantic priming occurred only at 80 ms (Experiment 3). Finally, with short primes only (20, 40, 60 ms), effects were not significant but were numerically in the expected direction for 40 and 60 ms (Experiment 4). In all experiments, fixation durations on the target word increased with prime durations under all conditions. The evidence for extraction of semantic information from the parafoveal word favors an explanation in terms of parallel word processing in reading.}, language = {en} } @article{DimigenValsecchieSommeretal.2009, author = {Dimigen, Olaf and Valsecchie, Matteo and Sommer, Werner and Kliegl, Reinhold}, title = {Human microsaccade-related visual brain responses}, issn = {0270-6474}, doi = {10.1523/JNEUROSCI.0911-09.2009}, year = {2009}, language = {en} } @article{FanselowKlieglSchlesewsky1999, author = {Fanselow, Gisbert and Kliegl, Reinhold and Schlesewsky, Matthias}, title = {Processing difficulty and principles of grammar}, year = {1999}, language = {en} } @misc{NuthmannVituEngbertetal.2015, author = {Nuthmann, Antje and Vitu, Fran{\c{c}}oise and Engbert, Ralf and Kliegl, Reinhold}, title = {No evidence for a saccadic range effect for visually guided and memory-guided saccades in simple saccade-targeting tasks}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {506}, issn = {1866-8364}, doi = {10.25932/publishup-41163}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-411639}, pages = {27}, year = {2015}, abstract = {Saccades to single targets in peripheral vision are typically characterized by an undershoot bias. Putting this bias to a test, Kapoula [1] used a paradigm in which observers were presented with two different sets of target eccentricities that partially overlapped each other. Her data were suggestive of a saccadic range effect (SRE): There was a tendency for saccades to overshoot close targets and undershoot far targets in a block, suggesting that there was a response bias towards the center of eccentricities in a given block. Our Experiment 1 was a close replication of the original study by Kapoula [1]. In addition, we tested whether the SRE is sensitive to top-down requirements associated with the task, and we also varied the target presentation duration. In Experiments 1 and 2, we expected to replicate the SRE for a visual discrimination task. The simple visual saccade-targeting task in Experiment 3, entailing minimal top-down influence, was expected to elicit a weaker SRE. Voluntary saccades to remembered target locations in Experiment 3 were expected to elicit the strongest SRE. Contrary to these predictions, we did not observe a SRE in any of the tasks. Our findings complement the results reported by Gillen et al. [2] who failed to find the effect in a saccade-targeting task with a very brief target presentation. Together, these results suggest that unlike arm movements, saccadic eye movements are not biased towards making saccades of a constant, optimal amplitude for the task.}, language = {en} } @misc{FroemerDimigenNiefindetal.2015, author = {Fr{\"o}mer, Romy and Dimigen, Olaf and Niefind, Florian and Kliegl, Reinhold and Sommer, Werner}, title = {Are individual differences in reading speed related to extrafoveal visual acuity and crowding?}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {494}, issn = {1866-8364}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-408003}, pages = {18}, year = {2015}, abstract = {Readers differ considerably in their speed of self-paced reading. One factor known to influence fixation durations in reading is the preprocessing of words in parafoveal vision. Here we investigated whether individual differences in reading speed or the amount of information extracted from upcoming words (the preview benefit) can be explained by basic differences in extrafoveal vision-i.e., the ability to recognize peripheral letters with or without the presence of flanking letters. Forty participants were given an adaptive test to determine their eccentricity thresholds for the identification of letters presented either in isolation (extrafoveal acuity) or flanked by other letters (crowded letter recognition). In a separate eye-tracking experiment, the same participants read lists of words from left to right, while the preview of the upcoming words was manipulated with the gaze-contingent moving window technique. Relationships between dependent measures were analyzed on the observational level and with linear mixed models. We obtained highly reliable estimates both for extrafoveal letter identification (acuity and crowding) and measures of reading speed (overall reading speed, size of preview benefit). Reading speed was higher in participants with larger uncrowded windows. However, the strength of this relationship was moderate and it was only observed if other sources of variance in reading speed (e.g., the occurrence of regressive saccades) were eliminated. Moreover, the size of the preview benefit-an important factor in normal reading-was larger in participants with better extrafoveal acuity. Together, these results indicate a significant albeit moderate contribution of extrafoveal vision to individual differences in reading speed.}, language = {en} } @misc{MatuschekKlieglHolschneider2015, author = {Matuschek, Hannes and Kliegl, Reinhold and Holschneider, Matthias}, title = {Smoothing Spline ANOVA decomposition of arbitrary Splines}, series = {Postprints der Universit{\"a}t Potsdam Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam Mathematisch-Naturwissenschaftliche Reihe}, number = {537}, issn = {1866-8372}, doi = {10.25932/publishup-40978}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-409788}, pages = {15}, year = {2015}, abstract = {The Smoothing Spline ANOVA (SS-ANOVA) requires a specialized construction of basis and penalty terms in order to incorporate prior knowledge about the data to be fitted. Typically, one resorts to the most general approach using tensor product splines. This implies severe constraints on the correlation structure, i.e. the assumption of isotropy of smoothness can not be incorporated in general. This may increase the variance of the spline fit, especially if only a relatively small set of observations are given. In this article, we propose an alternative method that allows to incorporate prior knowledge without the need to construct specialized bases and penalties, allowing the researcher to choose the spline basis and penalty according to the prior knowledge of the observations rather than choosing them according to the analysis to be done. The two approaches are compared with an artificial example and with analyses of fixation durations during reading.}, language = {en} } @inproceedings{TeichFuehnerGolleetal.2022, author = {Teich, Paula and F{\"u}hner, Thea Heidi and Golle, Kathleen and Kliegl, Reinhold}, title = {How did the Sars-CoV-2 Pandemic affect the Physical Fitness of Primary School Children?}, doi = {10.25932/publishup-56085}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-560855}, pages = {20}, year = {2022}, abstract = {Throughout the years 2020 and 2021, schools were temporarily closed to slow the spread of SarsCoV-2. For some periods, children were locked out of sports in schools (physical education lessons, school sports working groups) and organized sports in sports clubs which often resulted in physical inactivity. Did these restrictions affect children's physical fitness? The EMOTIKON project (www.uni-potsdam.de/emotikon) annually assesses the physical fitness (cardiorespiratory endurance [6-minute-run test], coordination [star-run test], speed [20-m sprint test], lower [standing long jump test] and upper [ball push test] limbs muscle power, and balance [one-legged stance test]) of all third graders in the Federal State of Brandenburg, Germany. Participation is mandatory for all public primary schools. In the falls from 2016 to 2021, 83,476 keyage children (i.e., school enrollment according to the legal key date, between eight and nine years in third grade) from 512 schools were assessed with the EMOTIKON test battery. We tested the Covid pandemic effect on a composite score of the four highly correlated physical fitness tests assessing cardiorespiratory endurance, coordination, speed and powerLOW and on another composite score of the three running tests (cardiorespiratory endurance, coordination, speed), as well as separately on all six physical fitness components. Secular trends for each of the physical fitness components and differences between schools and children were taken into account in linear mixed models. We found a negative Covid pandemic effect on the two composite physical fitness scores, as well as on cardiorespiratory endurance, coordination, and speed. We found a positive Covid pandemic effect on powerLOW. Coordination was associated with the largest negative Covid pandemic effect, also passing the threshold of smallest meaningful change (SMC, i.e., 0.2 Cohen's d) when accumulated across two years. Given the educational context, Covid pandemic effects were also compared relative to the expected age-related development of the physical fitness components between eight and nine years. The Covid pandemic-related developmental costs/gains ranged from three to seven months relative to a longitudinal age effect, and from five to 17 months relative to a cross-sectional age effect. We propose that a longitudinal assessment yields a more reliable estimate of the developmental (age-related) gain than a cross-sectional one. Therefore, we consider the smaller Covid pandemic-related developmental costs/gains to be more credible. Interestingly, on the school level, „fitter" schools (relatively higher Grand Mean) exhibited larger negative Covid pandemic effects than schools with a lower physical fitness score. Negative Covid pandemic effects for the three run tasks were also found by B{\"a}hr et al. (2022), who tested the physical fitness of 16,496 Thuringian third-graders from 292 schools with the same six physical fitness tests used in EMOTIKON. Our results may be used to prioritize health-related interventions.}, language = {en} } @article{LaubrockKlieglRolfsetal.2010, author = {Laubrock, Jochen and Kliegl, Reinhold and Rolfs, Martin and Engbert, Ralf}, title = {When do microsaccades follow spatial attention?}, issn = {1943-3921}, doi = {10.3758/APP.72.3.683}, year = {2010}, abstract = {Following up on an exchange about the relation between microsaccades and spatial attention (Horowitz, Fencsik, Fine, Yurgenson, \& Wolfe, 2007; Horowitz, Fine, Fencsik, Yurgenson, \& Wolfe, 2007; Laubrock, Engbert, Rolfs, \& Kliegl, 2007), we examine the effects of selection criteria and response modality. We show that for Posner cuing with saccadic responses, microsaccades go with attention in at least 75\% of cases (almost 90\% if probability matching is assumed) when they are first (or only) microsaccades in the cue target interval and when they occur between 200 and 400 msec after the cue. The relation between spatial attention and the direction of microsaccades drops to chance level for unselected microsaccades collected during manual-response conditions. Analyses of data from four cross-modal cuing experiments demonstrate an above-chance, intermediate link for visual cues, but no systematic relation for auditory cues. Thus, the link between spatial attention and direction of microsaccades depends on the experimental condition and time of occurrence, but it can be very strong.}, language = {en} } @article{KlieglDambacherDimigenetal.2012, author = {Kliegl, Reinhold and Dambacher, Michael and Dimigen, Olaf and Jacobs, Arthur M. and Sommer, Werner}, title = {Eye movements and brain electric potentials during reading}, series = {Psychological research : an international journal of perception, attention, memory, and action}, volume = {76}, journal = {Psychological research : an international journal of perception, attention, memory, and action}, number = {2}, publisher = {Springer}, address = {Heidelberg}, issn = {0340-0727}, doi = {10.1007/s00426-011-0376-x}, pages = {145 -- 158}, year = {2012}, abstract = {The development of theories and computational models of reading requires an understanding of processing constraints, in particular of timelines related to word recognition and oculomotor control. Timelines of word recognition are usually determined with event-related potentials (ERPs) recorded under conditions of serial visual presentation (SVP) of words; timelines of oculomotor control are derived from parameters of eye movements (EMs) during natural reading. We describe two strategies to integrate these approaches. One is to collect ERPs and EMs in separate SVP and natural reading experiments for the same experimental material (but different subjects). The other strategy is to co-register EMs and ERPs during natural reading from the same subjects. Both strategies yield data that allow us to determine how lexical properties influence ERPs (e.g., the N400 component) and EMs (e.g., fixation durations) across neighboring words. We review our recent research on the effects of frequency and predictability of words on both EM and ERP measures with reference to current models of eye-movement control during reading. Results are in support of the proposition that lexical access is distributed across several fixations and across brain-electric potentials measured on neighboring words.}, language = {en} } @article{AngeleSlatteryYangetal.2008, author = {Angele, Bernhard and Slattery, Timothy J. and Yang, Jinmian and Kliegl, Reinhold and Rayner, Keith}, title = {Parafoveal processing in reading : manipulating n+1 and n+2 previews simultaneously}, issn = {1350-6285}, doi = {10.1080/13506280802009704}, year = {2008}, abstract = {The boundary paradigm (Rayner, 1975) with a novel preview manipulation was used to examine the extent of parafoveal processing of words to the right of fixation. Words n + 1 and n + 2 had either correct or incorrect previews prior to fixation (prior to crossing the boundary location). In addition, the manipulation utilized either a high or low frequency word in word n + 1 location on the assumption that it would be more likely that n + 2 preview effects could be obtained when word n + 1 was high frequency. The primary findings were that there was no evidence for a preview benefit for word n + 2 and no evidence for parafoveal-on-foveal effects when word n + 1 is at least four letters long. We discuss implications for models of eye-movement control in reading.}, language = {en} } @article{LaubrockEngbertRolfsetal.2007, author = {Laubrock, Jochen and Engbert, Ralf and Rolfs, Martin and Kliegl, Reinhold}, title = {Microsaccades are an index of covert attention : commentary on Horowitz, Fine, Fencsik, Yurgenson and Wolfe}, issn = {0956-7976}, doi = {10.1111/j.1467-9280.2007.01904.x}, year = {2007}, language = {en} } @article{BostonHaleKliegletal.2008, author = {Boston, Marisa Ferrara and Hale, John and Kliegl, Reinhold and Patil, Umesh and Vasishth, Shravan}, title = {Parsing costs as predictors of reading difficulty : an evaluation using the Potsdam Sentence Corpus}, issn = {1995-8692}, year = {2008}, language = {en} } @article{NicenboimVasishthGatteietal.2015, author = {Nicenboim, Bruno and Vasishth, Shravan and Gattei, Carolina and Sigman, Mariano and Kliegl, Reinhold}, title = {Working memory differences in long-distance dependency resolution}, series = {Frontiers in psychology}, volume = {6}, journal = {Frontiers in psychology}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2015.00312}, pages = {16}, year = {2015}, abstract = {There is a wealth of evidence showing that increasing the distance between an argument and its head leads to more processing effort, namely, locality effects: these are usually associated with constraints in working memory (DLT: Gibson, 2000: activation-based model: Lewis and Vasishth, 2005). In SOV languages, however, the opposite effect has been found: antilocality (see discussion in Levy et al., 2013). Antilocality effects can be explained by the expectation based approach as proposed by Levy (2008) or by the activation-based model of sentence processing as proposed by Lewis and Vasishth (2005). We report an eye-tracking and a self-paced reading study with sentences in Spanish together with measures of individual differences to examine the distinction between expectation- and memory based accounts, and within memory-based accounts the further distinction between DLT and the activation-based model. The experiments show that (i) antilocality effects as predicted by the expectation account appear only for high-capacity readers; (ii) increasing dependency length by interposing material that modifies the head of the dependency (the verb) produces stronger facilitation than increasing dependency length with material that does not modify the head; this is in agreement with the activation-based model but not with the expectation account; and (iii) a possible outcome of memory load on low-capacity readers is the increase in regressive saccades (locality effects as predicted by memory-based accounts) or, surprisingly, a speedup in the self-paced reading task; the latter consistent with good-enough parsing (Ferreira et al., 2002). In sum, the study suggests that individual differences in working memory capacity play a role in dependency resolution, and that some of the aspects of dependency resolution can be best explained with the activation-based model together with a prediction component.}, language = {en} } @article{vonderMalsburgKlieglVasishth2015, author = {von der Malsburg, Titus Raban and Kliegl, Reinhold and Vasishth, Shravan}, title = {Determinants of Scanpath Regularity in Reading}, series = {Cognitive science : a multidisciplinary journal of anthropology, artificial intelligence, education, linguistics, neuroscience, philosophy, psychology ; journal of the Cognitive Science Society}, volume = {39}, journal = {Cognitive science : a multidisciplinary journal of anthropology, artificial intelligence, education, linguistics, neuroscience, philosophy, psychology ; journal of the Cognitive Science Society}, number = {7}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {0364-0213}, doi = {10.1111/cogs.12208}, pages = {1675 -- 1703}, year = {2015}, abstract = {Scanpaths have played an important role in classic research on reading behavior. Nevertheless, they have largely been neglected in later research perhaps due to a lack of suitable analytical tools. Recently, von der Malsburg and Vasishth (2011) proposed a new measure for quantifying differences between scanpaths and demonstrated that this measure can recover effects that were missed with the traditional eyetracking measures. However, the sentences used in that study were difficult to process and scanpath effects accordingly strong. The purpose of the present study was to test the validity, sensitivity, and scope of applicability of the scanpath measure, using simple sentences that are typically read from left to right. We derived predictions for the regularity of scanpaths from the literature on oculomotor control, sentence processing, and cognitive aging and tested these predictions using the scanpath measure and a large database of eye movements. All predictions were confirmed: Sentences with short words and syntactically more difficult sentences elicited more irregular scanpaths. Also, older readers produced more irregular scanpaths than younger readers. In addition, we found an effect that was not reported earlier: Syntax had a smaller influence on the eye movements of older readers than on those of young readers. We discuss this interaction of syntactic parsing cost with age in terms of shifts in processing strategies and a decline of executive control as readers age. Overall, our results demonstrate the validity and sensitivity of the scanpath measure and thus establish it as a productive and versatile tool for reading research.}, language = {en} } @article{LaubrockKliegl2015, author = {Laubrock, Jochen and Kliegl, Reinhold}, title = {The eye-voice span during reading aloud}, series = {Frontiers in psychology}, volume = {6}, journal = {Frontiers in psychology}, number = {1432}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2015.01432}, year = {2015}, abstract = {Although eye movements during reading are modulated by cognitive processing demands, they also reflect visual sampling of the input, and possibly preparation of output for speech or the inner voice. By simultaneously recording eye movements and the voice during reading aloud, we obtained an output measure that constrains the length of time spent on cognitive processing. Here we investigate the dynamics of the eye-voice span (EVS), the distance between eye and voice. We show that the EVS is regulated immediately during fixation of a word by either increasing fixation duration or programming a regressive eye movement against the reading direction. EVS size at the beginning of a fixation was positively correlated with the likelihood of regressions and refixations. Regression probability was further increased if the EVS was still large at the end of a fixation: if adjustment of fixation duration did not sufficiently reduce the EVS during a fixation, then a regression rather than a refixation followed with high probability. We further show that the EVS can help understand cognitive influences on fixation duration during reading: in mixed model analyses, the EVS was a stronger predictor of fixation durations than either word frequency or word length. The EVS modulated the influence of several other predictors on single fixation durations (SFDs). For example, word-N frequency effects were larger with a large EVS, especially when word N-1 frequency was low. Finally, a comparison of SFDs during oral and silent reading showed that reading is governed by similar principles in both reading modes, although EVS maintenance and articulatory processing also cause some differences. In summary, the EVS is regulated by adjusting fixation duration and/or by programming a regressive eye movement when the EVS gets too large. Overall, the EVS appears to be directly related to updating of the working memory buffer during reading.}, language = {en} } @article{YanRichterShuetal.2009, author = {Yan, Ming and Richter, Eike M. and Shu, Hua and Kliegl, Reinhold}, title = {Readers of Chinese extract semantic information from parafoveal words}, issn = {1069-9384}, doi = {10.3758/Pbr.16.3.561}, year = {2009}, abstract = {Evidence for semantic preview benefit (PB) from parafoveal words has been elusive for reading alphabetic scripts such as English. Here we report semantic PB for noncompound characters in Chinese reading with the boundary paradigm. In addition, PBs for orthographic relatedness and, as a numeric trend, for phonological relatedness were obtained. Results are in agreement with other research suggesting that the Chinese writing system is based on a closer association between graphic form and meaning than is alphabetic script. We discuss implications for notions of serial attention shifts and parallel distributed processing of words during reading.}, language = {en} } @article{LindenbergerBrehmerKliegletal.2008, author = {Lindenberger, Ulman and Brehmer, Y. and Kliegl, Reinhold and Baltes, Paul B.}, title = {Benefits of graphic design expertise in old age : compensatory effects of a graphical lexicon?}, isbn = {978-0-521-87205-8}, year = {2008}, language = {en} } @article{BoettcherRolfsKliegletal.2009, author = {B{\"o}ttcher, Heiko and Rolfs, Martin and Kliegl, Reinhold and Ihle, Wolfgang}, title = {Inattentional blindness and change blindness bei Jungen mit ADHS : Posterpr{\"a}sentation}, issn = {1616-3443}, doi = {10.1026/1616-3443.38.S1.20}, year = {2009}, language = {de} } @article{KlieglRolfsLaubrocketal.2009, author = {Kliegl, Reinhold and Rolfs, Martin and Laubrock, Jochen and Engbert, Ralf}, title = {Microsaccadic modulation of response times in spatial attention tasks}, issn = {0340-0727}, doi = {10.1007/s00426-008-0202-2}, year = {2009}, language = {en} } @article{BoettcherRolfsKliegletal.2009, author = {B{\"o}ttcher, Heiko and Rolfs, Martin and Kliegl, Reinhold and Ihle, Wolfgang}, title = {Inattentional blindness and change blindness bei Jungen mit ADHS}, year = {2009}, language = {en} } @article{OberauerKliegl2010, author = {Oberauer, Klaus and Kliegl, Reinhold}, title = {Interferenz im Arbeitsged{\"a}chtnis : ein formales Modell}, issn = {0033-3042}, doi = {10.1026/0033-3042/a000008}, year = {2010}, language = {de} } @article{BostonHaleKliegletal.2008, author = {Boston, Marisa Ferrara and Hale, John and Kliegl, Reinhold and Vasishth, Shravan}, title = {Surprising parser actions and reading difficulty}, year = {2008}, language = {en} } @article{FernandezShalomKliegletal.2014, author = {Fernandez, Gerardo and Shalom, Diego E. and Kliegl, Reinhold and Sigman, Mariano}, title = {Eye movements during reading proverbs and regular sentences: the incoming word predictability effect}, series = {Language, cognition and neuroscience}, volume = {29}, journal = {Language, cognition and neuroscience}, number = {3}, publisher = {Routledge, Taylor \& Francis Group}, address = {Abingdon}, issn = {2327-3798}, doi = {10.1080/01690965.2012.760745}, pages = {260 -- 273}, year = {2014}, language = {en} } @article{JuengerKlieglOberauer2014, author = {J{\"u}nger, Elisabeth and Kliegl, Reinhold and Oberauer, Klaus}, title = {No evidence for feature overwriting in visual working memory}, series = {Memory}, volume = {22}, journal = {Memory}, number = {4}, publisher = {Routledge, Taylor \& Francis Group}, address = {Abingdon}, issn = {0965-8211}, pages = {374 -- 389}, year = {2014}, language = {en} } @article{FroemerDimigenNiefindetal.2015, author = {Fr{\"o}mer, Romy and Dimigen, Olaf and Niefind, Florian and Krause, Niels and Kliegl, Reinhold and Sommer, Werner}, title = {Are Individual Differences in Reading Speed Related to Extrafoveal Visual Acuity and Crowding?}, series = {PLoS one}, volume = {10}, journal = {PLoS one}, number = {3}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0121986}, pages = {18}, year = {2015}, abstract = {Readers differ considerably in their speed of self-paced reading. One factor known to influence fixation durations in reading is the preprocessing of words in parafoveal vision. Here we investigated whether individual differences in reading speed or the amount of information extracted from upcoming words (the preview benefit) can be explained by basic differences in extrafoveal vision-i.e., the ability to recognize peripheral letters with or without the presence of flanking letters. Forty participants were given an adaptive test to determine their eccentricity thresholds for the identification of letters presented either in isolation (extrafoveal acuity) or flanked by other letters (crowded letter recognition). In a separate eye-tracking experiment, the same participants read lists of words from left to right, while the preview of the upcoming words was manipulated with the gaze-contingent moving window technique. Relationships between dependent measures were analyzed on the observational level and with linear mixed models. We obtained highly reliable estimates both for extrafoveal letter identification (acuity and crowding) and measures of reading speed (overall reading speed, size of preview benefit). Reading speed was higher in participants with larger uncrowded windows. However, the strength of this relationship was moderate and it was only observed if other sources of variance in reading speed (e.g., the occurrence of regressive saccades) were eliminated. Moreover, the size of the preview benefit-an important factor in normal reading-was larger in participants with better extrafoveal acuity. Together, these results indicate a significant albeit moderate contribution of extrafoveal vision to individual differences in reading speed.}, language = {en} } @article{MatuschekKlieglHolschneider2015, author = {Matuschek, Hannes and Kliegl, Reinhold and Holschneider, Matthias}, title = {Smoothing Spline ANOVA Decomposition of Arbitrary Splines: An Application to Eye Movements in Reading}, series = {PLoS one}, volume = {10}, journal = {PLoS one}, number = {3}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0119165}, pages = {15}, year = {2015}, abstract = {The Smoothing Spline ANOVA (SS-ANOVA) requires a specialized construction of basis and penalty terms in order to incorporate prior knowledge about the data to be fitted. Typically, one resorts to the most general approach using tensor product splines. This implies severe constraints on the correlation structure, i.e. the assumption of isotropy of smoothness can not be incorporated in general. This may increase the variance of the spline fit, especially if only a relatively small set of observations are given. In this article, we propose an alternative method that allows to incorporate prior knowledge without the need to construct specialized bases and penalties, allowing the researcher to choose the spline basis and penalty according to the prior knowledge of the observations rather than choosing them according to the analysis to be done. The two approaches are compared with an artificial example and with analyses of fixation durations during reading.}, language = {en} } @article{YanZhouShuetal.2015, author = {Yan, Ming and Zhou, Wei and Shu, Hua and Kliegl, Reinhold}, title = {Perceptual span depends on font size during the reading of chinese sentences}, series = {Journal of experimental psychology : Learning, memory, and cognition}, volume = {41}, journal = {Journal of experimental psychology : Learning, memory, and cognition}, number = {1}, publisher = {American Psychological Association}, address = {Washington}, issn = {0278-7393}, doi = {10.1037/a0038097}, pages = {209 -- 219}, year = {2015}, abstract = {The present study explored the perceptual span (i.e., the physical extent of an area from which useful visual information is extracted during a single fixation) during the reading of Chinese sentences in 2 experiments. In Experiment 1, we tested whether the rightward span can go beyond 3 characters when visually similar masks were used. Results showed that Chinese readers needed at least 4 characters to the right of fixation to maintain a normal reading behavior when visually similar masks were used and when characters were displayed in small fonts, indicating that the span is dynamically influenced by masking materials. In Experiments 2 and 3, we asked whether the perceptual span varies as a function of font size in spaced (German) and unspaced (Chinese) scripts. Results clearly suggest perceptual span depends on font size in Chinese, but we failed to find such evidence for German. We propose that the perceptual span in Chinese is flexible; it is strongly constrained by its language-specific properties such as high information density and lack of word spacing. Implications for saccade-target selection during the reading of Chinese sentences are discussed.}, language = {en} } @article{GoetheOberauerKliegl2016, author = {G{\"o}the, Katrin and Oberauer, Klaus and Kliegl, Reinhold}, title = {Eliminating dual-task costs by minimizing crosstalk between tasks: The role of modality and feature pairings}, series = {Cognition : international journal of cognitive science}, volume = {150}, journal = {Cognition : international journal of cognitive science}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0010-0277}, doi = {10.1016/j.cognition.2016.02.003}, pages = {92 -- 108}, year = {2016}, abstract = {We tested the independent influences of two content-based factors on dual-task costs, and on the parallel processing ability: The pairing of S-R modalities and the pairing of relevant features between stimuli and responses of two tasks. The two pairing factors were realized across four dual-task groups. Within each group the two tasks comprised two different stimulus modalities (visual and auditory), two different relevant stimulus features (spatial and verbal) and two response modalities (manual and vocal). Pairings of S-R modalities (standard: visual-manual and auditory-vocal, non-standard: visual-vocal and auditory manual) and feature pairings (standard: spatial-manual and verbal-vocal, non-standard: spatial-vocal and verbal-manual) varied across groups. All participants practiced their respective dual-task combination in a paradigm with simultaneous stimulus onset before being transferred to a psychological refractory period paradigm varying stimulus-onset asynchrony. A comparison at the end of practice revealed similar dual-task costs and similar pairing effects in both paradigms. Dual-task costs depended on modality and feature pairings. Groups training with non-standard feature pairings (i.e., verbal stimulus features mapped to spatially separated response keys, or spatial stimulus features mapped to verbal responses) and non-standard modality pairings (i.e., auditory stimulus mapped to manual response, or visual stimulus mapped to vocal responses) had higher dual-task costs than respective standard pairings. In contrast, irrespective of modality pairing dual-task costs virtually disappeared with standard feature pairings after practice in both paradigms. The results can be explained by crosstalk between feature-binding processes for the two tasks. Crosstalk was present for non-standard but absent for standard feature pairings. Therefore, standard feature pairings enabled parallel processing at the end of practice. (C) 2016 Elsevier B.V. All rights reserved.}, language = {en} } @article{BaayenVasishthKliegletal.2017, author = {Baayen, Harald R. and Vasishth, Shravan and Kliegl, Reinhold and Bates, Douglas}, title = {The cave of shadows: Addressing the human factor with generalized additive mixed models}, series = {Journal of memory and language}, volume = {94}, journal = {Journal of memory and language}, publisher = {Elsevier}, address = {San Diego}, issn = {0749-596X}, doi = {10.1016/j.jml.2016.11.006}, pages = {206 -- 234}, year = {2017}, language = {en} } @article{HofmannDambacherJacobsetal.2014, author = {Hofmann, Markus J. and Dambacher, Michael and Jacobs, Arthur M. and Kliegl, Reinhold and Radach, Ralph and Kuchinke, Lars and Plichta, Michael M. and Fallgatter, Andreas J. and Herrmann, Martin J.}, title = {Occipital and orbitofrontal hemodynamics during naturally paced reading: An fNIRS study}, series = {NeuroImage : a journal of brain function}, volume = {94}, journal = {NeuroImage : a journal of brain function}, publisher = {Elsevier}, address = {San Diego}, issn = {1053-8119}, doi = {10.1016/j.neuroimage.2014.03.014}, pages = {193 -- 202}, year = {2014}, abstract = {Humans typically read at incredibly fast rates, because they predict likely occurring words from a given context. Here, we used functional near-infrared spectroscopy (fNIRS) to track the ultra-rapid hemodynamic responses of words presented every 280 ms in a naturally paced sentence context. We found a lower occipital deoxygenation to unpredictable than to predictable words. The greater hemodynamic responses to unexpected words suggest that the visual features of expected words have been pre-activated previous to stimulus presentation. Second, we tested opposing theoretical proposals about the role of the medial orbitofrontal cortex (OFC): Either OFC may respond to the breach of expectation; or OFC is activated when the present stimulus matches the prediction. A significant interaction between word frequency and predictability indicated OFC responses to breaches of expectation for low- but not for high-frequency words: OFC is sensitive to both, bottom-up processing as mediated by word frequency, as well as top-down predictions. Particularly, when a rare word is unpredictable, OFC becomes active. Finally, we discuss how a high temporal resolution can help future studies to disentangle the hemodynamic responses of single trials in such an ultra-rapid event succession as naturally paced reading. (C) 2014 Elsevier Inc. All rights reserved.}, language = {en} } @article{NuthmannVituEngbertetal.2016, author = {Nuthmann, Antje and Vitu, Francoise and Engbert, Ralf and Kliegl, Reinhold}, title = {No Evidence for a Saccadic Range Effect for Visually Guided and Memory-Guided Saccades in Simple Saccade-Targeting Tasks}, series = {PLoS one}, volume = {11}, journal = {PLoS one}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0162449}, pages = {9935 -- 9943}, year = {2016}, abstract = {Saccades to single targets in peripheral vision are typically characterized by an undershoot bias. Putting this bias to a test, Kapoula [1] used a paradigm in which observers were presented with two different sets of target eccentricities that partially overlapped each other. Her data were suggestive of a saccadic range effect (SRE): There was a tendency for saccades to overshoot close targets and undershoot far targets in a block, suggesting that there was a response bias towards the center of eccentricities in a given block. Our Experiment 1 was a close replication of the original study by Kapoula [1]. In addition, we tested whether the SRE is sensitive to top-down requirements associated with the task, and we also varied the target presentation duration. In Experiments 1 and 2, we expected to replicate the SRE for a visual discrimination task. The simple visual saccade-targeting task in Experiment 3, entailing minimal top-down influence, was expected to elicit a weaker SRE. Voluntary saccades to remembered target locations in Experiment 3 were expected to elicit the strongest SRE. Contrary to these predictions, we did not observe a SRE in any of the tasks. Our findings complement the results reported by Gillen et al. [2] who failed to find the effect in a saccade-targeting task with a very brief target presentation. Together, these results suggest that unlike arm movements, saccadic eye movements are not biased towards making saccades of a constant, optimal amplitude for the task.}, language = {en} } @article{YanKliegl2016, author = {Yan, Ming and Kliegl, Reinhold}, title = {CarPrice versus CarpRice: Word Boundary Ambiguity Influences Saccade Target Selection During the Reading of Chinese Sentences}, series = {Journal of experimental psychology : Learning, memory, and cognition}, volume = {42}, journal = {Journal of experimental psychology : Learning, memory, and cognition}, publisher = {American Psychological Association}, address = {Washington}, issn = {0278-7393}, doi = {10.1037/xlm0000276}, pages = {1832 -- 1838}, year = {2016}, abstract = {As a contribution to a theoretical debate about the degree of high-level influences on saccade targeting during sentence reading, we investigated eye movements during the reading of structurally ambiguous Chinese character strings and examined whether parafoveal word segmentation could influence saccade-target selection. As expected, ambiguous strings took longer to process. More critically there were theoretically relevant interactions between ambiguity and launch site when first-fixation location and saccade amplitude served as dependent variables: Ambiguous strings in the parafovea triggered longer saccades and more rightward fixations for close launch sites than unambiguous ones; the reverse result was obtained for far launch sites. These crossover interactions indicate that parafoveal word segmentation influences saccade generation in Chinese and provide support of the hypothesis that high-level information can be involved in the decision about where to fixate next.}, language = {en} } @article{OhlKliegl2016, author = {Ohl, Sven and Kliegl, Reinhold}, title = {Revealing the time course of signals influencing the generation of}, series = {Vision research : an international journal for functional aspects of vision.}, volume = {124}, journal = {Vision research : an international journal for functional aspects of vision.}, publisher = {Elsevier}, address = {Oxford}, issn = {0042-6989}, doi = {10.1016/j.visres.2016.06.007}, pages = {52 -- 58}, year = {2016}, abstract = {Saccadic eye movements are frequently followed by smaller secondary saccades which are generally assumed to correct for the error in primary saccade landing position. However, secondary saccades can also occur after accurate primary saccades and they are often as small as microsaccades, therefore raising the need to further scrutinize the processes involved in secondary saccade generation. Following up a previous study, we analyzed secondary saccades using rate analysis which allows us to quantify experimental effects as shifts in distributions, therefore going beyond comparisons of mean differences. We use Aalen's additive hazards model to delineate the time course of key influences on the secondary saccade rate. In addition to the established effect of primary saccade error, we observed a time-varying influence of under- vs. overshooting - with a higher risk of generating secondary saccades following undershoots. Moreover, increasing target eccentricity influenced the programming of secondary saccades, therefore demonstrating that error-unrelated variables co-determine secondary saccade programs. Our results provide new insights into the generative mechanisms of small saccades during postsaccadic fixation that need to be accounted for by secondary saccade models.}, language = {en} } @article{WeckJungaKliegletal.2021, author = {Weck, Florian and Junga, Yvonne Marie and Kliegl, Reinhold and Hahn, Daniela and Brucker, Katharina and Witth{\"o}ft, Michael}, title = {Effects of competence feedback on therapist competence and patient outcome}, series = {Journal of consulting and clinical psychology}, volume = {89}, journal = {Journal of consulting and clinical psychology}, number = {11}, publisher = {American Psychological Association}, address = {Washington}, issn = {0022-006X}, doi = {10.1037/ccp0000686}, pages = {885 -- 897}, year = {2021}, abstract = {Objective: Therapist competence is considered essential for the success of psychotherapy. Feedback is an intervention which has the potential to improve therapist competence. The present study investigated whether competence feedback leads to an improvement of therapist competence and patient outcome. Method: Sixty-seven master-level clinical trainees were randomly assigned to either a competence feedback group (CFG) or a control group (CG). Patients with a diagnosis of major depression (N = 114) were randomly assigned to CFG or CG. Treatment included 20 individual sessions of cognitive behavioral therapy (CBT). In CFG, therapists received, parallel to the treatment, five competence feedbacks, based on videotaped therapy sessions. Independent raters assessed therapist competence with the Cognitive Therapy Scale (CTS) and provided the competence feedback. Patient outcome was evaluated with the Beck Depression Inventory-II (BDI-II) and therapeutic alliance (Helping Alliance Questionnaire [HAQ]) from both therapist's (HAQ-T) and patient's (HAQ-P) perspective were evaluated after each of the 20 sessions. Results: (a) Therapist competence (CTS) increased significantly more for CFG than CG. (b) Depression (BDI-II) decreased significantly across sessions for both groups, but without evidence for a group-differential benefit for the CFG. (c) Therapeutic alliance (HAQ-T/P) increased significantly across sessions for both groups from both perspectives, but without group differences. (d) There is a positive effect of BDI-II on CTS at the beginning and a negative effect of CTS on BDI-II at the end of therapy. Conclusion: Competence feedback improves therapists' independently rated competence, but there is no evidence that competence feedback in CBT leads to better outcome. What is the public health significance of this article? This study suggests the substantial value of systematic competence feedback for improving therapist competence in the psychotherapy of depression. No significant effect of competence feedback on the reduction of reported depressive symptoms was found.}, language = {en} } @article{JohanssenSchoofsKliegletal.2022, author = {Johanssen, Helen and Schoofs, Nikola and Kliegl, Reinhold and Bermpohl, Felix and {\"U}lsmann, Dominik and Schulte-Herbr{\"u}ggen, Olaf and Priebe, Kathlen}, title = {Negative posttraumatic cognitions color the pathway from event centrality to posttraumatic stress disorder symptoms}, series = {Cognitive therapy and research}, volume = {46}, journal = {Cognitive therapy and research}, number = {2}, publisher = {Springer Science + Business Media B.V.}, address = {Dordrecht}, issn = {0147-5916}, doi = {10.1007/s10608-021-10266-w}, pages = {333 -- 342}, year = {2022}, abstract = {Background The centrality of an event indicates the extent to which it becomes a core part of identity and life story. Event centrality (EC) has been shown to have a strong relationship with PTSD symptoms, which seems to be indirectly influenced by negative posttraumatic cognitions (PTC). However, research on this potential mediation and its causal links particularly with clinical samples is limited and essential to derive treatment implications. Methods Pre- and posttreatment data of 103 day-unit patients with PTSD was examined using mediation analyses and structural equation modeling. Results Negative PTC mediated the relationship between EC and PTSD symptoms, partially pre- and completely posttreatment. Within extended longitudinal analyses causal directions of the mediation pathways were not adequately interpretable due to unexpected suppression effects. Conclusions The results suggest that EC may only have an indirect effect on PTSD symptoms through negative PTC. Thus, decreasing negative PTC which are connected to centralized events might be a key element for PTSD treatment. Thereby, transforming the cognitions' valence to more positive and constructive forms could be crucial rather than mere decentralization. Although suppression effects limited causal inferences, they do not contradict the mediation and further indicate potential interactional terms and a transformation of EC.}, language = {en} } @article{ZhouWangShuetal.2018, author = {Zhou, Wei and Wang, Aiping and Shu, Hua and Kliegl, Reinhold and Yan, Ming}, title = {Word segmentation by alternating colors facilitates eye guidance in Chinese reading}, series = {Memory \& cognition}, volume = {46}, journal = {Memory \& cognition}, number = {5}, publisher = {Springer}, address = {New York}, issn = {0090-502X}, doi = {10.3758/s13421-018-0797-5}, pages = {729 -- 740}, year = {2018}, abstract = {During sentence reading, low spatial frequency information afforded by spaces between words is the primary factor for eye guidance in spaced writing systems, whereas saccade generation for unspaced writing systems is less clear and under debate. In the present study, we investigated whether word-boundary information, provided by alternating colors (consistent or inconsistent with word-boundary information) influences saccade-target selection in Chinese. In Experiment 1, as compared to a baseline (i.e., uniform color) condition, word segmentation with alternating color shifted fixation location towards the center of words. In contrast, incorrect word segmentation shifted fixation location towards the beginning of words. In Experiment 2, we used a gaze-contingent paradigm to restrict the color manipulation only to the upcoming parafoveal words and replicated the results, including fixation location effects, as observed in Experiment 1. These results indicate that Chinese readers are capable of making use of parafoveal word-boundary knowledge for saccade generation, even if such information is unfamiliar to them. The present study provides novel support for the hypothesis that word segmentation is involved in the decision about where to fixate next during Chinese reading.}, language = {en} } @article{YanPanChangetal.2019, author = {Yan, Ming and Pan, Jinger and Chang, Wenshuo and Kliegl, Reinhold}, title = {Read sideways or not: vertical saccade advantage in sentence reading}, series = {Reading and writing : an interdisciplinary journal}, volume = {32}, journal = {Reading and writing : an interdisciplinary journal}, number = {8}, publisher = {Springer}, address = {Dordrecht}, issn = {0922-4777}, doi = {10.1007/s11145-018-9930-x}, pages = {1911 -- 1926}, year = {2019}, abstract = {During the reading of alphabetic scripts and scene perception, eye movements are programmed more efficiently in horizontal direction than in vertical direction. We propose that such a directional advantage may be due the overwhelming reading experience in the horizontal direction. Writing orientation is highly flexible for Traditional Chinese sentences. We compare horizontal and vertical eye movements during reading of such sentences and provide first evidence of a text-orientation effect on eye-movement control during reading. In addition to equivalent reading speed in both directions, more fine-grained analyses demonstrate a tradeoff between longer fixation durations and better fixation locations in vertical than in horizontal reading. Our results suggest that with extensive reading experience, Traditional Chinese readers can generate saccades more efficiently in vertical than in horizontal direction.}, language = {en} } @article{OezkanFikriKırkıcıetal.2020, author = {{\"O}zkan, Ay{\c{s}}eg{\"u}l and Fikri, Figen Beken and K{\i}rk{\i}c{\i}, Bilal and Kliegl, Reinhold and Acart{\"u}rk, Cengiz}, title = {Eye movement control in Turkish sentence reading}, series = {Quarterly journal of experimental psychology : QJEP / EPS, Experimental Psychology Society}, volume = {74}, journal = {Quarterly journal of experimental psychology : QJEP / EPS, Experimental Psychology Society}, number = {2}, publisher = {Sage Publ.}, address = {London}, issn = {1747-0218}, doi = {10.1177/1747021820963310}, pages = {377 -- 397}, year = {2020}, abstract = {Reading requires the assembly of cognitive processes across a wide spectrum from low-level visual perception to high-level discourse comprehension. One approach of unravelling the dynamics associated with these processes is to determine how eye movements are influenced by the characteristics of the text, in particular which features of the words within the perceptual span maximise the information intake due to foveal, spillover, parafoveal, and predictive processing. One way to test the generalisability of current proposals of such distributed processing is to examine them across different languages. For Turkish, an agglutinative language with a shallow orthography-phonology mapping, we replicate the well-known canonical main effects of frequency and predictability of the fixated word as well as effects of incoming saccade amplitude and fixation location within the word on single-fixation durations with data from 35 adults reading 120 nine-word sentences. Evidence for previously reported effects of the characteristics of neighbouring words and interactions was mixed. There was no evidence for the expected Turkish-specific morphological effect of the number of inflectional suffixes on single-fixation durations. To control for word-selection bias associated with single-fixation durations, we also tested effects on word skipping, single-fixation, and multiple-fixation cases with a base-line category logit model, assuming an increase of difficulty for an increase in the number of fixations. With this model, significant effects of word characteristics and number of inflectional suffixes of foveal word on probabilities of the number of fixations were observed, while the effects of the characteristics of neighbouring words and interactions were mixed.}, language = {en} } @article{YanPanKliegl2019, author = {Yan, Ming and Pan, Jinger and Kliegl, Reinhold}, title = {Eye Movement Control in Chinese Reading: A Cross-Sectional Study}, series = {Developmental psychology}, volume = {55}, journal = {Developmental psychology}, number = {11}, publisher = {American Psychological Association}, address = {Washington}, issn = {0012-1649}, doi = {10.1037/dev0000819}, pages = {2275 -- 2285}, year = {2019}, abstract = {The present study explored the age-related changes of eye movement control in reading-that is, where to send the eyes and when to move them. Different orthographies present readers with somewhat different problems to solve, and this might, in turn, be reflected in different patterns of development of reading skill. Participants of different developmental levels (Grade 3, N = 30; Grade 5, N = 27 and adults, N = 27) were instructed to read sentences for comprehension while their eye movements were recorded. Contrary to previous findings that have been well documented indicating early maturation of saccade generation in English, current results showed that saccade generation among Chinese readers was still under development at Grade 5, although immediate lexical processing was relatively well-established. The distinct age-related changes in eye movements are attributable to certain linguistic properties of Chinese including the lack of interword spaces and word boundary uncertainty. The present study offers an example of how human eye movement adapts to the orthographic environment.}, language = {en} } @article{YanWangSongetal.2019, author = {Yan, Ming and Wang, Aiping and Song, Hosu and Kliegl, Reinhold}, title = {Parafoveal processing of phonology and semantics during the reading of Korean sentences}, series = {Cognition : international journal of cognitive science}, volume = {193}, journal = {Cognition : international journal of cognitive science}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0010-0277}, doi = {10.1016/j.cognition.2019.104009}, pages = {7}, year = {2019}, abstract = {The present study sets out to address two fundamental questions in the reading of continuous texts: Whether semantic and phonological information from upcoming words can be accessed during natural reading. In the present study we investigated parafoveal processing during the reading of Korean sentences, manipulating semantic and phonological information from parafoveal preview words. In addition to the first evidence for a semantic preview effect in Korean, we found that Korean readers have stronger and more long-lasting phonological than semantic activation from parafoveal words in second-pass reading. The present study provides an example that human mind can flexibly adjust processing priority to different types of information based on the linguistic environment.}, language = {en} } @article{MassonRabeKliegl2017, author = {Masson, Michael E. J. and Rabe, Maximilian M. and Kliegl, Reinhold}, title = {Modulation of additive and interactive effects by trial history revisited}, series = {Memory \& cognition}, volume = {45}, journal = {Memory \& cognition}, publisher = {Springer}, address = {New York}, issn = {0090-502X}, doi = {10.3758/s13421-016-0666-z}, pages = {480 -- 492}, year = {2017}, language = {en} } @article{MatuschekKliegl2017, author = {Matuschek, Hannes and Kliegl, Reinhold}, title = {On the ambiguity of interaction and nonlinear main effects in a regime of dependent covariates}, series = {Behavior research methods : a journal of the Psychonomic Society}, volume = {50}, journal = {Behavior research methods : a journal of the Psychonomic Society}, number = {5}, publisher = {Springer}, address = {New York}, issn = {1554-351X}, doi = {10.3758/s13428-017-0956-9}, pages = {1882 -- 1894}, year = {2017}, abstract = {The analysis of large experimental datasets frequently reveals significant interactions that are difficult to interpret within the theoretical framework guiding the research. Some of these interactions actually arise from the presence of unspecified nonlinear main effects and statistically dependent covariates in the statistical model. Importantly, such nonlinear main effects may be compatible (or, at least, not incompatible) with the current theoretical framework. In the present literature, this issue has only been studied in terms of correlated (linearly dependent) covariates. Here we generalize to nonlinear main effects (i.e., main effects of arbitrary shape) and dependent covariates. We propose a novel nonparametric method to test for ambiguous interactions where present parametric methods fail. We illustrate the method with a set of simulations and with reanalyses (a) of effects of parental education on their children's educational expectations and (b) of effects of word properties on fixation locations during reading of natural sentences, specifically of effects of length and morphological complexity of the word to be fixated next. The resolution of such ambiguities facilitates theoretical progress.}, language = {en} } @article{EngbertRabeKliegletal.2021, author = {Engbert, Ralf and Rabe, Maximilian Michael and Kliegl, Reinhold and Reich, Sebastian}, title = {Sequential data assimilation of the stochastic SEIR epidemic model for regional COVID-19 dynamics}, series = {Bulletin of mathematical biology : official journal of the Society for Mathematical Biology}, volume = {83}, journal = {Bulletin of mathematical biology : official journal of the Society for Mathematical Biology}, number = {1}, publisher = {Springer}, address = {New York}, issn = {0092-8240}, doi = {10.1007/s11538-020-00834-8}, pages = {16}, year = {2021}, abstract = {Newly emerging pandemics like COVID-19 call for predictive models to implement precisely tuned responses to limit their deep impact on society. Standard epidemic models provide a theoretically well-founded dynamical description of disease incidence. For COVID-19 with infectiousness peaking before and at symptom onset, the SEIR model explains the hidden build-up of exposed individuals which creates challenges for containment strategies. However, spatial heterogeneity raises questions about the adequacy of modeling epidemic outbreaks on the level of a whole country. Here, we show that by applying sequential data assimilation to the stochastic SEIR epidemic model, we can capture the dynamic behavior of outbreaks on a regional level. Regional modeling, with relatively low numbers of infected and demographic noise, accounts for both spatial heterogeneity and stochasticity. Based on adapted models, short-term predictions can be achieved. Thus, with the help of these sequential data assimilation methods, more realistic epidemic models are within reach.}, language = {en} } @article{LiWangMoetal.2018, author = {Li, Nan and Wang, Suiping and Mo, Luxi and Kliegl, Reinhold}, title = {Contextual constraint and preview time modulate the semantic preview effect}, series = {The quarterly journal of experimental psychology}, volume = {71}, journal = {The quarterly journal of experimental psychology}, number = {1}, publisher = {Sage Publ.}, address = {London}, issn = {1747-0218}, doi = {10.1080/17470218.2017.1310914}, pages = {241 -- 249}, year = {2018}, abstract = {Word recognition in sentence reading is influenced by information from both preview and context. Recently, semantic preview effect (SPE) was observed being modulated by the constraint of context, indicating that context might accelerate the processing of semantically related preview words. Besides, SPE was found to depend on preview time, which suggests that SPE may change with different processing stages of preview words. Therefore, it raises the question of whether preview time-dependent SPE would be modulated by contextual constraint. In this study, we not only investigated the impact of contextual constraint on SPE in Chinese reading but also examined its dependency on preview time. The preview word and the target word were identical, semantically related or unrelated to the target word. The results showed a significant three-way interaction: The SPE depended on contextual constraint and preview time. In separate analyses for low and high contextual constraint of target words, the SPE significantly decreased with an increase in preview duration when the target word was of low constraint in the sentence. The effect was numerically in the same direction but weaker and statistically nonsignificant when the target word was highly constrained in the sentence. The results indicate that word processing in sentences is a dynamic process of integrating information from both preview (bottom-up) and context (top-down).}, language = {en} } @misc{RheinbergManigKliegletal.2008, author = {Rheinberg, Falko and Manig, Yvette and Kliegl, Reinhold and Engeser, Stefan and Vollmeyer, Regina}, title = {Flow bei der Arbeit, doch Gl{\"u}ck in der Freizeit : Zielausrichtung, Flow und Gl{\"u}cksgef{\"u}hle}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-19740}, year = {2008}, abstract = {Bei N = 101 Arbeitnehmern verschiedener Berufe wurden mit der Experience Sampling Method (ESM) eine Woche lang Daten zum Flow-Erleben, zu Gl{\"u}ck/Zufriedenheit und zur Zielausrichtung laufender Aktivit{\"a}ten erhoben (N = 4603 Messungen). Die Daten wurden mit GLMM-Analysen ausgewertet. Auch bei der jetzt vollst{\"a}ndigen Erfassung aller Flow-Komponenten mit der FKS best{\"a}tigte sich das „Paradoxon der Arbeit", wonach w{\"a}hrend der Arbeit h{\"o}here Flow-Werte, aber niedrigere Werte f{\"u}r Gl{\"u}ck/Zufriedenheit auftreten als jeweils in der Freizeit. W{\"a}hrend der Arbeit waren Aktivit{\"a}ten h{\"a}ufiger auf die Erreichung von Zielen ausgerichtet als w{\"a}hrend der Freizeit. Die Zielausrichtung wirkte auf Flow vs. Gl{\"u}ck/Zufriedenheit signifikant verschieden. W{\"a}hrend der Arbeit hat die Zielausrichtung auf Flow einen stark positiven Effekt, auf Gl{\"u}ck/Zufriedenheit jedoch nicht. Im Freizeitbereich war der Effekt von Zielausrichtung auf Gl{\"u}ck/Zufriedenheit sogar negativ. Das „Paradoxon der Arbeit" l{\"a}sst sich partiell als Effekt der Zielausrichtung verstehen.}, language = {de} } @misc{WernerDonnellyKliegl1987, author = {Werner, John S. and Donnelly, Seaneen K. and Kliegl, Reinhold}, title = {Aging and human macular pigment density : appended with translations from the work of Max Schultze and Ewald Hering}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16836}, year = {1987}, abstract = {The optical density of human macular pigment was measured for 50 observers ranging in age from 10 to 90 years. The psychophysical method required adjusting the radiance of a 1°, monochromatic light (400-550 nm) to minimize flicker (15 Hz) when presented in counterphase with a 460 nm standard. This test stimulus was presented superimposed on a broad-band, short-wave background. Macular pigment density was determined by comparing sensitivity under these conditions for the fovea, where macular pigment is maximal, and 5° temporally. This difference spectrum, measured for 12 observers, matched Wyszecki and Stiles's standard density spectrum for macular pigment. To study variation in macular pigment density for a larger group of observers, measurements were made at only selected spectral points (460, 500 and 550 nm). The mean optical density at 460 nm for the complete sample of 50 subjects was 0.39. Substantial individual differences in density were found (ca. 0.10-0.80), but this variation was not systematically related to age.}, language = {en} } @misc{KlieglOlsenDavidson1982, author = {Kliegl, Reinhold and Olsen, Richard K. and Davidson, Brian J.}, title = {Regression analyses as a tool for studying reading processes : comment on Just and Carpenter's eye fixation theory}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16857}, year = {1982}, abstract = {Just and Carpenter (1980) presented a theory of reading based on eye fixations wherein their "psycholinguistic" variables accounted for 72\% of the variance in word gaze durations. This comment raises some statistical and theoretical problems with their use of simultaneous regression analysis of gaze duration measures and with the resulting theory of reading. A major problem was the confounding of perceptual with psycholinguistic factors. New eye fixation data are presented to support these criticisms. Analysis of fixations within words revealed that most gaze duration variance was contributed by number of fixations rather than by fixation duration.}, language = {en} } @misc{OlsonDavidsonKliegletal.1984, author = {Olson, Richard K. and Davidson, Brian J. and Kliegl, Reinhold and Davies, Susan E.}, title = {Development of phonetic memory in disabled and normal readers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16888}, year = {1984}, abstract = {The development of phonetic codes in memory of 141 pairs of normal and disabled readers from 7.8 to 16.8 years of age was tested with a task adapted from L. S. Mark, D. Shankweiler, I. Y. Liberman, and C. A. Fowler (Memory \& Cognition, 1977, 5, 623-629) that measured false-positive errors in recognition memory for foil words which rhymed with words in the memory list versus foil words that did not rhyme. Our younger subjects replicated Mark et al., showing a larger difference between rhyming and nonrhyming false-positive errors for the normal readers. The older disabled readers' phonetic effect was comparable to that of the younger normal readers, suggesting a developmental lag in their use of phonetic coding in memory. Surprisingly, the normal readers' phonetic effect declined with age in the recognition task, but they maintained a significant advantage across age in the auditory WISC-R digit span recall test, and a test of phonological nonword decoding. The normals' decline with age in rhyming confusion may be due to an increase in the precision of their phonetic codes.}, language = {en} } @article{RisseKliegl2012, author = {Risse, Sarah and Kliegl, Reinhold}, title = {Evidence for delayed Parafoveal-on-Foveal effects from word n+2 in reading}, series = {Journal of experimental psychology : Human perception and performance}, volume = {38}, journal = {Journal of experimental psychology : Human perception and performance}, number = {4}, publisher = {American Psychological Association}, address = {Washington}, issn = {0096-1523}, doi = {10.1037/a0027735}, pages = {1026 -- 1042}, year = {2012}, abstract = {During reading information is acquired from word(s) beyond the word that is currently looked at. It is still an open question whether such parafoveal information can influence the current viewing of a word, and if so, whether such parafoveal-on-foveal effects are attributable to distributed processing or to mislocated fixations which occur when the eyes are directed at a parafoveal word but land on another word instead. In two display-change experiments, we orthogonally manipulated the preview and target difficulty of word n+2 to investigate the role of mislocated fixations on the previous word n+1. When the eyes left word n, an easy or difficult word n+2 preview was replaced by an easy or difficult n+2 target word. In Experiment 1, n+2 processing difficulty was manipulated by means of word frequency (i.e., easy high-frequency vs. difficult low-frequency word n+2). In Experiment 2, we varied the visual familiarity of word n+2 (i.e., easy lower-case vs. difficult alternating-case writing). Fixations on the short word n+1, which were likely to be mislocated, were nevertheless not influenced by the difficulty of the adjacent word n+2, the hypothesized target of the mislocated fixation. Instead word n+1 was influenced by the preview difficulty of word n+2, representing a delayed parafoveal-on-foveal effect. The results challenge the mislocated-fixation hypothesis as an explanation of parafoveal-on-foveal effects and provide new insight into the complex spatial and temporal effect structure of processing inside the perceptual span during reading.}, language = {en} } @article{MayrKliegl1993, author = {Mayr, Ulrich and Kliegl, Reinhold}, title = {Sequential and coordinative complexity : age-based processing limitations in figural transformation}, issn = {0278-7393}, year = {1993}, abstract = {Dimensions of cognitive complexity in figural transformations were examined in the context of adult age differences. Sequential complexity was manipulated through figural transformations of single objects in a multiple- object array. Coordinative complexity was induced through spatial or nonspatial transformations of the entire array. Results confirmed the prediction that age-related slowing is larger in coordinative complexity than in sequential complexity conditions. The effect was stable across 8 sessions (Exp 1), was obtained when age groups were equated in accuracy with criterion-referenced testing (Exp 2), and was corroborated by age-differential probabilities of error types (Exps 1 and 2). A model is proposed attributing age effects under coordinative complexity to 2 factors: (1) basic- level slowing and (2) time-consuming reiterations through the processing sequence due to age-related working memory failures. (PsycINFO Database Record (c) 2012 APA, all rights reserved)}, language = {en} } @misc{MacWhinneyBatesKliegl1984, author = {MacWhinney, Brian and Bates, Elizabeth and Kliegl, Reinhold}, title = {Cue validity and sentence interpretation in English, German, and Italian}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16847}, year = {1984}, abstract = {Linguistic and psycholinguistic accounts based on the study of English may prove unreliable as guides to sentence processing in even closely related languages. The present study illustrates this claim in a test of sentence interpretation by German-, Italian-, and English-speaking adults. Subjects were presented with simple transitive sentences in which contrasts of (1) word order, (2) agreement, (3) animacy, and (4) stress were systematically varied. For each sentence, subjects were asked to state which of the two nouns was the actor. The results indicated that Americans relied overwhelming on word order, using a first-noun strategy in NVN and a second-noun strategy in VNN and NNV sentences. Germans relied on both agreement and animacy. Italians showed extreme reliance on agreement cues. In both German and Italian, stress played a role in terms of complex interactions with word order and agreement. The findings were interpreted in terms of the "competition model" of Bates and MacWhinney (in H. Winitz (Ed.), Annals of the New York Academy of Sciences Conference on Native and Foreign Language Acquisition. New York: New York Academy of Sciences, 1982) in which cue validity is considered to be the primary determinant of cue strength. According to this model, cues are said to be high in validity when they are also high in applicability and reliability.}, language = {en} } @misc{LindenbergerMayrKliegl1993, author = {Lindenberger, Ulman and Mayr, Ulrich and Kliegl, Reinhold}, title = {Speed and intelligence in old age}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40402}, year = {1993}, abstract = {Past research suggests that age differences in measures of cognitive speed contribute to differences in intellectual functioning between young and old adults. To investigate whether speed also predicts age-related differences in intellectual performance beyond age 70 years, tests indicating 5 intellectual abilities—speed, reasoning, memory, knowledge, and fluency—were administered to a close-to-representative, age-stratified sample of old and very old adults. Age trends of all 5 abilities were well described by a negative linear function. The speed-mediated effect of age fully explained the relationship between age and both the common and the specific variance of the other 4 abilities. Results offer strong support for the speed hypothesis of old age cognitive decline but need to be qualified by further research on the reasons underlying age differences in measures of speed.}, language = {en} } @article{LaubrockKliegl2015, author = {Laubrock, Jochen and Kliegl, Reinhold}, title = {The eye-voice span during reading aloud}, series = {Frontiers in psychology}, volume = {6}, journal = {Frontiers in psychology}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2015.01437}, pages = {19}, year = {2015}, abstract = {Although eye movements during reading are modulated by cognitive processing demands, they also reflect visual sampling of the input, and possibly preparation of output for speech or the inner voice. By simultaneously recording eye movements and the voice during reading aloud, we obtained an output measure that constrains the length of time spent on cognitive processing. Here we investigate the dynamics of the eye-voice span (EVS), the distance between eye and voice. We show that the EVS is regulated immediately during fixation of a word by either increasing fixation duration or programming a regressive eye movement against the reading direction. EVS size at the beginning of a fixation was positively correlated with the likelihood of regressions and refixations. Regression probability was further increased if the EVS was still large at the end of a fixation: if adjustment of fixation duration did not sufficiently reduce the EVS during a fixation, then a regression rather than a refixation followed with high probability. We further show that the EVS can help understand cognitive influences on fixation duration during reading: in mixed model analyses, the EVS was a stronger predictor of fixation durations than either word frequency or word length. The EVS modulated the influence of several other predictors on single fixation durations (SFDs). For example, word-N frequency effects were larger with a large EVS, especially when word N-1 frequency was low. Finally, a comparison of SFDs during oral and silent reading showed that reading is governed by similar principles in both reading modes, although EVS maintenance and articulatory processing also cause some differences. In summary, the EVS is regulated by adjusting fixation duration and/or by programming a regressive eye movement when the EVS gets too large. Overall, the EVS appears to be directly related to updating of the working memory buffer during reading.}, language = {en} } @article{MatuschekKlieglVasishthetal.2017, author = {Matuschek, Hannes and Kliegl, Reinhold and Vasishth, Shravan and Baayen, Harald R. and Bates, Douglas}, title = {Balancing Type I error and power in linear mixed models}, series = {Journal of memory and language}, volume = {94}, journal = {Journal of memory and language}, publisher = {Elsevier}, address = {San Diego}, issn = {0749-596X}, doi = {10.1016/j.jml.2017.01.001}, pages = {305 -- 315}, year = {2017}, abstract = {Linear mixed-effects models have increasingly replaced mixed-model analyses of variance for statistical inference in factorial psycholinguistic experiments. Although LMMs have many advantages over ANOVA, like ANOVAs, setting them up for data analysis also requires some care. One simple option, when numerically possible, is to fit the full variance covariance structure of random effects (the maximal model; Barr, Levy, Scheepers \& Tily, 2013), presumably to keep Type I error down to the nominal a in the presence of random effects. Although it is true that fitting a model with only random intercepts may lead to higher Type I error, fitting a maximal model also has a cost: it can lead to a significant loss of power. We demonstrate this with simulations and suggest that for typical psychological and psycholinguistic data, higher power is achieved without inflating Type I error rate if a model selection criterion is used to select a random effect structure that is supported by the data. (C) 2017 The Authors. Published by Elsevier Inc.}, language = {en} } @article{PanYanLaubrocketal.2014, author = {Pan, Jinger and Yan, Ming and Laubrock, Jochen and Shu, Hua and Kliegl, Reinhold}, title = {Saccade-target selection of dyslexic children when reading Chinese}, series = {Vision research : an international journal for functional aspects of vision.}, volume = {97}, journal = {Vision research : an international journal for functional aspects of vision.}, publisher = {Elsevier}, address = {Oxford}, issn = {0042-6989}, doi = {10.1016/j.visres.2014.01.014}, pages = {24 -- 30}, year = {2014}, abstract = {This study investigates the eye movements of dyslexic children and their age-matched controls when reading Chinese. Dyslexic children exhibited more and longer fixations than age-matched control children, and an increase of word length resulted in a greater increase in the number of fixations and gaze durations for the dyslexic than for the control readers. The report focuses on the finding that there was a significant difference between the two groups in the fixation landing position as a function of word length in single-fixation cases, while there was no such difference in the initial fixation of multi-fixation cases. We also found that both groups had longer incoming saccade amplitudes while the launch sites were closer to the word in single fixation cases than in multi-fixation cases. Our results suggest that dyslexic children's inefficient lexical processing, in combination with the absence of orthographic word boundaries in Chinese, leads them to select saccade targets at the beginning of words conservatively. These findings provide further evidence for parafoveal word segmentation during reading of Chinese sentences.}, language = {en} } @article{OhlWohltatKliegletal.2016, author = {Ohl, Sven and Wohltat, Christian and Kliegl, Reinhold and Pollatos, Olga and Engbert, Ralf}, title = {Microsaccades Are Coupled to Heartbeat}, series = {The journal of neuroscience}, volume = {36}, journal = {The journal of neuroscience}, publisher = {Society for Neuroscience}, address = {Washington}, issn = {0270-6474}, doi = {10.1523/JNEUROSCI.2211-15.2016}, pages = {1237 -- 1241}, year = {2016}, abstract = {During visual fixation, the eye generates microsaccades and slower components of fixational eye movements that are part of the visual processing strategy in humans. Here, we show that ongoing heartbeat is coupled to temporal rate variations in the generation of microsaccades. Using coregistration of eye recording and ECG in humans, we tested the hypothesis that microsaccade onsets are coupled to the relative phase of the R-R intervals in heartbeats. We observed significantly more microsaccades during the early phase after the R peak in the ECG. This form of coupling between heartbeat and eye movements was substantiated by the additional finding of a coupling between heart phase and motion activity in slow fixational eye movements; i.e., retinal image slip caused by physiological drift. Our findings therefore demonstrate a coupling of the oculomotor system and ongoing heartbeat, which provides further evidence for bodily influences on visuomotor functioning.}, language = {en} } @article{LaurinavichyuteSekerinaAlexeevaetal.2019, author = {Laurinavichyute, Anna and Sekerina, Irina A. and Alexeeva, Svetlana and Bagdasaryan, Kristine and Kliegl, Reinhold}, title = {Russian Sentence Corpus: Benchmark measures of eye movements in reading in Russian}, series = {Behavior research methods : a journal of the Psychonomic Society}, volume = {51}, journal = {Behavior research methods : a journal of the Psychonomic Society}, number = {3}, publisher = {Springer}, address = {New York}, issn = {1554-351X}, doi = {10.3758/s13428-018-1051-6}, pages = {1161 -- 1178}, year = {2019}, abstract = {This article introduces a new corpus of eye movements in silent readingthe Russian Sentence Corpus (RSC). Russian uses the Cyrillic script, which has not yet been investigated in cross-linguistic eye movement research. As in every language studied so far, we confirmed the expected effects of low-level parameters, such as word length, frequency, and predictability, on the eye movements of skilled Russian readers. These findings allow us to add Slavic languages using Cyrillic script (exemplified by Russian) to the growing number of languages with different orthographies, ranging from the Roman-based European languages to logographic Asian ones, whose basic eye movement benchmarks conform to the universal comparative science of reading (Share, 2008). We additionally report basic descriptive corpus statistics and three exploratory investigations of the effects of Russian morphology on the basic eye movement measures, which illustrate the kinds of questions that researchers can answer using the RSC. The annotated corpus is freely available from its project page at the Open Science Framework: https://osf.io/x5q2r/.}, language = {en} } @article{NicenboimVasishthGatteietal.2015, author = {Nicenboim, Bruno and Vasishth, Shravan and Gattei, Carolina and Sigman, Mariano and Kliegl, Reinhold}, title = {Working memory differences in long-distance dependency resolution}, series = {Frontiers in psychology}, volume = {6}, journal = {Frontiers in psychology}, number = {312}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2015.00312}, pages = {16}, year = {2015}, abstract = {There is a wealth of evidence showing that increasing the distance between an argument and its head leads to more processing effort, namely, locality effects; these are usually associated with constraints in working memory (DLT: Gibson, 2000; activation-based model: Lewis and Vasishth, 2005). In SOV languages, however, the opposite effect has been found: antilocality (see discussion in Levy et al., 2013). Antilocality effects can be explained by the expectation-based approach as proposed by Levy (2008) or by the activation-based model of sentence processing as proposed by Lewis and Vasishth (2005). We report an eye-tracking and a self-paced reading study with sentences in Spanish together with measures of individual differences to examine the distinction between expectation- and memory-based accounts, and within memory-based accounts the further distinction between DLT and the activation-based model. The experiments show that (i) antilocality effects as predicted by the expectation account appear only for high-capacity readers; (ii) increasing dependency length by interposing material that modifies the head of the dependency (the verb) produces stronger facilitation than increasing dependency length with material that does not modify the head; this is in agreement with the activation-based model but not with the expectation account; and (iii) a possible outcome of memory load on low-capacity readers is the increase in regressive saccades (locality effects as predicted by memory-based accounts) or, surprisingly, a speedup in the self-paced reading task; the latter consistent with good-enough parsing (Ferreira et al., 2002). In sum, the study suggests that individual differences in working memory capacity play a role in dependency resolution, and that some of the aspects of dependency resolution can be best explained with the activation-based model together with a prediction component.}, language = {en} } @misc{KlannDeliusKauschkeGluecketal.2008, author = {Klann-Delius, Gisela and Kauschke, Christina and Gl{\"u}ck, Christian W. and Schr{\"o}der, Astrid and Lorenz, Antje and Domahs, Frank and Grande, Marion and Domahs, Ulrike and Frankenberg, Jenny v. and Wahl, Michael and De Kok, D{\"o}rte and Stadie, Nicole and Machleb, Franziska and Manz, Katrin and Frank, Ulrike and Sperlich, Kathrin and Vauth, Friederike and Hampel, Pamela and M{\"a}der, Mark and Sticher, Heike and Bethmann, Anja and Fischenich, Andrea and Scheich, Henning and Brechmann, Andr{\´e} and Peschke, Claudia and Ziegler, Wolfram and Kappes, Juliane and Baumg{\"a}rtner, Annette and Sonntag, Kristin and Bartels, Luise and Heide, Judith and Meinunger, Andr{\´e} and Burchert, Frank and Bohn, Christiane and Kliegl, Reinhold and Gottal, Stephanie and Berendes, Karin and Grabherr, Britta and Schneeberg, Jennifer and Wittler, Marion and Ptok, Martin and Sallat, Stephan}, title = {Spektrum Patholinguistik = Schwerpunktthema: der Erwerb von Lexikon und Semantik: Meilensteine, St{\"o}rungen und Therapie ; Tagungsband zum 1. Herbsttreffen Patholinguistik, 24. November 2007}, number = {1}, editor = {Wahl, Michael and Michael, Judith and Hanne, Sandra}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, organization = {Verband f{\"u}r Patholinguistik e. V. (vpl)}, issn = {1869-3822}, doi = {10.25932/publishup-1719}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18688}, year = {2008}, abstract = {Der vorliegende Tagungsband enth{\"a}lt alle Beitr{\"a}ge des 1. Herbsttreffens Patholinguistik, das am 24.11.2007 an der Universit{\"a}t Potsdam stattgefunden hat. Sowohl die drei Hauptvortr{\"a}ge zum Thema „Der Erwerb von Lexikon und Semantik - Meilensteine, St{\"o}rungen und Therapie" als auch die Kurzvortr{\"a}ge promovierter Patholinguisten sind ausf{\"u}hrlich dokumentiert. Außerdem enth{\"a}lt der Tagungsband die Abstracts der pr{\"a}sentierten Poster.}, language = {de} } @misc{KlieglLindenberger1993, author = {Kliegl, Reinhold and Lindenberger, Ulman}, title = {Modeling intrusions and correct recall in episodic memory : adult age differences in encoding of list context}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40397}, year = {1993}, abstract = {A model for correct recall and intrusions in cued recall of word lists is introduced. Intrusions are false responses that were correct in an earlier list. The model assumes 3 exclusive states for memory traces after encoding: with a list tag (i.e., with information about list origin), without list tags, and missing. Across lists, a trace can lose its list tag or its content. For retrieval, an optimal strategy of response selection was assumed. Younger and older laboratory-trained mnemonists participated in 2 experiments in which recall of permutations of a single word list across a single set of cues was held constant with individually adjusted presentation times. With correct recall equated to younger adults, older adults were more susceptible to intrusions. Age differences were restricted to model parameters estimating the probability of generation of list tags. Alternative accounts of age differences in context memory are discussed.}, language = {en} } @misc{ThompsonKliegl1991, author = {Thompson, Laura A. and Kliegl, Reinhold}, title = {Adult age effects of plausibility on memory : the role of time constraints during encoding}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40347}, year = {1991}, abstract = {We investigated the role of training-induced knowledge Schemas and encoding time on adult age differences in recall. High-plausible (schema coherent) words were recalled better than lowplausible (schema discrepant) words in both age groups. This difference was larger for old-adults than for young adults for presentation times ranging from 3 s to 11 s per word. After equating participants in overall recall (i.e., at 50\% correct) by dynamic adjustment of presentation time, old adults again showed a stronger plausibility effect than young adults when recall was above criterion. In a second experiment with self-paced encoding, old adults used more time than young adults only for low-plausible pairs, yet they still remembered fewer of them. In a third experiment, both age groups preferred to imagine high- rather than low-plausible words, but this effect was more pronounced in old adults. The results indicate that, compared with young adults, old adults find it particularly difficult to form elaborative mental images of schema-discrepant information under a wide variety of time constraints during encoding. Results are discussed in relation to explanations based on age-related mental slowing.}, language = {en} } @misc{LindenbergerKlieglBates1992, author = {Lindenberger, Ulman and Kliegl, Reinhold and Bates, Paul B.}, title = {Professional expertise does not eliminate age differences in imagery-based memory performance during adulthood}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40384}, year = {1992}, abstract = {Using a testing-the-limits paradigm, the authors investigated the modulation (attenuation) o f negative adult age differences in imagery-based memory performance as a function of professional expertise. Six older graphic designers, 6 normal older adults, 6 younger graphic design students, and 6 normal younger students participated in a 19-session program with a cued-recall variant of the Method of Loci. Older graphic designers attained higher levels o f mnemonic performance than normal older adults but were not able to reach younger adults' level of performance; a perfect separation of age groups was achieved. Spatial visualization was a good predictor of mnemonic performance. Results suggest that negative adult age differences in imagery-based memory are attenuated but not eliminated by the advantages associated with criterion-relevant ability (talent) and experience.}, language = {en} } @misc{KlieglSmithBaltes1990, author = {Kliegl, Reinhold and Smith, Jacqui and Baltes, Paul B.}, title = {On the locus and process of magnification of age differences during mnemonic training}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40336}, year = {1990}, abstract = {The focus of this study was on developmental reserve capacity in old age as revealed by testing-thelimits. We examined (a) the time course of training-related magnification of age differences in serial word recall and (b) predictability of training gains by pretest individual differences in cognitive abilities. In 20 sessions, young (n = 18) and old (n = 19) adults were taught to recall lists of 30 words using the Method of Loci. Age differences were magnified early in practice at long presentation times (20 s and 15 s per word) and later at 5 s per word. Regression of posttraining scores on various pretraining abilities revealed significant effects of digit symbol substitution. Also, consistent with the assumption of age-related decline in developmental reserve capacity, the unique variance in serial word recall associated with age group became more salient as the training unfolded.}, language = {en} } @misc{KlieglSmithBaltes1989, author = {Kliegl, Reinhold and Smith, Jacqui and Baltes, Paul B.}, title = {Testing-the-limits and the study of adult age differences in cognitive plasticity of a mnemonic skill}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40311}, year = {1989}, abstract = {Investigated the range and limits of cognitive reserve capacity as a general approach to the understanding of age differences in cognitive functioning. Testing-the-limits is proposed as a research strategy, Data are reported from 2 training studies involving old (65 to 83 years old) and young adults (19 to 29 years old). The training, designed to engineer an expertise in serial word recall, involved instruction and practice in the Method of Loci. Substantial plasticity was evident in pretest to posttest comparisons. Participants raised their serial word recall several times above that of pretest baseline. Age-differential limits in reserve capacity were evident in amount of training gain but not in responses to conditions of increased test difficulty (speeded stimulus presentation). Group differences were magnified by the training to such a degree that age distributions barely overlapped at posttests. Testing-the-limits offers promise in terms of understanding the extent and nature of cognitive plasticity.}, language = {en} } @misc{KlieglBaltes1991, author = {Kliegl, Reinhold and Baltes, Paul B.}, title = {Testing-the-Limits kognitiver Entwicklungskapazit{\"a}t in einer Ged{\"a}chtnisleistung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40362}, year = {1991}, abstract = {Bisherige Ergebnisse der kognitiven Altersforschung erlauben keine Schlußfolgerung dar{\"u}ber, ob die Gr{\"o}ße und Robustheit der Altersverluste in kognitiven Basisprozessen irreversibel sind und folglich als Indikatoren neurobiologischer Grenzen des alternden Organismus interpretiert werden k{\"o}nnen: Durch die Forschungsstrategie des Testing-the-Limits wurden im Zusammenhang mit einer kognitiven Intervention zuverl{\"a}ssige Ergebnisse bez{\"u}glich alterskorrelierter Grenzen kognitiver Entwicklungskapazit{\"a}t erwartet. Gesunde {\"a}ltere und junge Erwachsene nahmen an 38 {\"u}ber ein Jahr verteilten experimentellen Sitzungen teil, in denen sie in einer Ged{\"a}chtnistechnik, der Methode der Orte, trainiert und wiederholt getestest wurden. Die Kriteriumsaufgabe war das Behalten langer Wortlisten auf der Grundlage der Erzeugung phantasievoller Gedankenbilder. Obwohl {\"a}ltere Erwachsene in der Lage waren, die Ged{\"a}chtnistechnik zu erwerben, zeigte sich unter Testing-the-Limits- Bedingungen eine nahezu vollst{\"a}ndige Entzerrung der Leistungsverteilungen junger und {\"a}lterer Erwachsener, die auch durch langfristiges Training nicht abgebaut wurde. Die Ergebnisse werden in Hinblick auf (1) die Bedeutung spezifischer kognitiver Basisprozesse, (2) Kohorten- bvs. biologische Alterseffekte und (3) m{\"o}gliche Ausnahmen vom Altersabbau diskutiert.}, language = {de} } @misc{Kliegl1989, author = {Kliegl, Reinhold}, title = {Kognitive Plastizit{\"a}t und altersbedingte Grenzen am Beispiel des Erwerbs einer Ged{\"a}chtnistechnik}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40321}, year = {1989}, abstract = {Die Bedeutung kognitiver Entwicklungskapazit{\"a}t (Plastizit{\"a}t) und ihrer altersabh{\"a}ngigen Grenzen f{\"u}r Theorien kognitiven Alters wird thematisiert. F{\"u}r kognitive Basisprozesse wird erwartet, daß die durch Training umgesetzte Entwicklungskapazit{\"a}t {\"a}lterer Menschen zwar ausreicht, die Ausgangsleistung junger Erwachsener zu {\"u}bertreffen, daß aber aufgrund altersbedingter Grenzen der Entwicklungskapazit{\"a}t nur sehr wenige {\"a}ltere Erwachsene das Leistungsniveau trainierter junger Erwachsener erreichen werden. Am Beispiel eines Ged{\"a}chtnistrainingsprogrammes zur Erh{\"o}hung der Merkf{\"a}higkeit f{\"u}r Wortlisten werden zwei Forschungsstrategien vorgestellt: (a) das Training von sehr leistungsf{\"a}higen {\"a}lteren Erwachsenen und (b) L{\"a}ngsschnitt-Einzelfall-Studien. Die experimentellen Befunde best{\"a}tigten die theoretischen Erwartungen. Zwar waren die Leistungen der besten {\"a}lteren Erwachsenen etwa doppelt so hoch wie die untrainierter junger Erwachsener, aber die durch das Training aufgedeckten Altersverluste konnten auch in bis zu 75 weiteren {\"U}bungsstunden nicht behoben werden.}, language = {de} } @misc{DittmannKohliLachmannKliegletal.1991, author = {Dittmann-Kohli, Freya and Lachmann, Margie E. and Kliegl, Reinhold and Baltes, Paul B.}, title = {Effects of cognitive training and testing on intellectual efficacy beliefs in elderly adults}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40351}, year = {1991}, abstract = {Elderly adults (N = 116; average age = 73 years) were randomly assigned to one of four treatment groups varying in the amount of training and testing on fluid intelligence tests. They were compared before and after treatment on self-efficacy and utility beliefs for intelligence tests and everyday competence. Although both ability training and extended retest practice resulted in significant gains in objective test performance (Baltes, Kliegl, \& Dittmann-Kohli, 1988), only ability training resulted in positive changes in self-efficacy. However, these changes were restricted to testrelated self-efficacy. Training had no impact on perceived utility or on everyday self-efficacy beliefs. Implications of the results are discussed with regard to interventions to increase intellectual self-efficacy in elderly persons.}, language = {en} } @misc{KlieglEngbert2007, author = {Kliegl, Reinhold and Engbert, Ralf}, title = {Conference Abstracts: 14th European Conference on Eye Movements ECEM2007}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-56799}, year = {2007}, language = {de} } @misc{GlassKliegl1983, author = {Glass, Gene V. and Kliegl, Reinhold}, title = {An apology for research integration in the study of psychotherapy}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40233}, year = {1983}, abstract = {Criticisms of the integration of psychotherapy-outcome research performed by Smith, Glass, and Miller (1980) are reviewed and answered. An attempt is made to account for the conflicting points of view in this disagreement in terms of certain issues that have engaged philosophers of science in the 20th century. It is hoped that, in passing, something useful is learned about research of many types on psychotherapy.}, language = {en} } @misc{KlieglBaltes1987, author = {Kliegl, Reinhold and Baltes, Paul B.}, title = {Theory-guided analysis of mechanisms of development and aging through testing-the-limits and research on expertise}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40265}, year = {1987}, abstract = {Content: 1 Introduction 2 Theoretical background - Expertise and Reserve Capacity - Testing-the-Limits and Research on Expertise - Cognitive Processes and Knowledge - Age Comparisons of Peak Performance - Advantages of Constructed Versus Naturally Acquired Expertise - Hypotheses Related to Aging and Expertise: Toward Magnification and Identification of Age Differences and Aging-Sensitive Components 3 Theory-guided synthesis of memory expertise - Theoretical Framework - Procedure - Subjects - Results 4 Adaptivity testing of expert memory - Increasing Task Difficulty Within an Extant System - Selective Componential Interference - Toward the Study of Compensatory Processes 5 Conclusions}, language = {en} } @misc{KlieglSmithHechhausenetal.1987, author = {Kliegl, Reinhold and Smith, Jacqui and Hechhausen, Jutta and Bates, Paul B.}, title = {Mnemonic training for the acquisition of skilled digit memory}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40252}, year = {1987}, abstract = {This article outlines a research strategy for investigating, in a laboratory setting, the acquisition and the "limits" of a cognitive skill. Expert digit memory is used as an illustration. Two participants with initial average digit- and word-span memory were trained to memorize and reproduce strings of 80 to 90 digits presented at 10- to 1-sec rates. The instruction and training program, based on a theory of skilled memory, focused on three components: (a) acquisition of a mnemonic system (i.e., recoding digits into historical dates or concrete nouns), (b) use of a long-term memory retrieval structure (i.e., instruction in the Method of Loci), and (c) improvement in processing speed. After 86 experimental sessions, one participant recalled 90 random digits presented at a 1-sec rate. The digits were, however, constrained to be compatible with the participant's historical knowledge. The second participant recalled 80 random digits presented at a 5-sec rate after 70 sessions. Speed of encoding and retrieval processing was the only component that required extensive practice for skilled digit-memory acquisition.}, language = {en} } @misc{KlieglSmithHeckhausenetal.1986, author = {Kliegl, Reinhold and Smith, Jacqui and Heckhausen, Jutta and Baltes, Paul B.}, title = {Ausbildung zum Ged{\"a}chtnisk{\"u}nstler : ein experimenteller Zugang zur {\"U}berpr{\"u}fung von Theorien kognitiven Lernens und Alterns}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40247}, year = {1986}, abstract = {Der hier berichtete Forschungsansatz kombiniert entwicklungs- und kognitionspsychologische Fragestellungen. Das entwicklungspsychologische Ziel war, Potential und Grenzen latenter kognitiver Leistungsreserven bei jungen und {\"a}lteren Erwachsenen sichtbar zu machen. Eine systematische Heranf{\"u}hrung an Leistungsgrenzen sollte außerdem die unterschiedliche Alterssensitivit{\"a}t kognitiver Prozesse verdeutlichen und zu einer Vergr{\"o}ßerung interindividueller Unterschiede f{\"u}hren. Das kognitionspsychologische Ziel war, die Genese kognitiver Expertise unter Laborbedingungen zu simulieren, wobei vor allem die Transformation von Laien- in Expertenwissen untersucht werden sollte. Diese {\"U}berlegungen wurden in einem Trainingsprogramm {\"u}berpr{\"u}ft, in dessen Verlauf junge und {\"a}ltere Erwachsene in einer Ged{\"a}chtniskunst f{\"u}r das Behalten von Zufallszahlen und Wortlisten unterwiesen wurden. Die Brauchbarkeit dieses experimentellen Paradigmas f{\"u}r die {\"U}berpr{\"u}fung der theoretischen Fragen wird durch Ergebnisse aus vier Einzelfallstudien belegt.}, language = {de} } @misc{BaltesKlieglDittmannKohli1988, author = {Baltes, Paul B. and Kliegl, Reinhold and Dittmann-Kohli, Freya}, title = {On the locus of training gains in research on the plasticity of fluid intelligence in old age}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40288}, year = {1988}, abstract = {Cognitive training research has shown that many older adults have a substantial reserve capacity in fluid intelligence. Little is known, however, about the locus of plasticity. Two studies were conducted to examine whether training gains in fluid abilities are critically dependent on experimenter-guided training and/or whether older adults can achieve similar improvements by themselves on the basis of cognitive skills already available in their repertoire. Several comparisons were made: (a) between test performances after trainer-guided training in ability-specific cognitive skills and after self-guided retest practice (without feedback), (b) between performances under speeded and power conditions of assessment, (c) between performances on easy and difficult items, and (d) between the relative numbers of correct and wrong answers. Results suggest that a large share of the training improvement shown by the elderly can plausibly be explained as the result of the activation and practice of cognitive skills already available in their repertoire. The results also have implications for educational practice, pointing to the appropriateness of strategies of self-directed learning for many elderly adults.}, language = {en} } @misc{KlieglSmithBaltes1986, author = {Kliegl, Reinhold and Smith, Jacqui and Baltes, Paul B.}, title = {Testing-the-limits, expertise, and memory in adulthood and old age}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39063}, year = {1986}, abstract = {This research has three interrelated foci: (i) engineering and testing a cognitive model of expert memory, (ii) the study of intellectual reserve capacity and (iii) the use of a testing-the-limits methodology to magnify and delineate age differences in limits of reserve capacity. The assumption is that age differences are magnified if studied at high levels of expertise or task difficulty. Results from age-comparative point training studies in expert memory are reported. Both young and elderly subjects reached high levels of skilled memory, confirming the model. However, despite this sizeable reserve capacity, when compared to IQ-eguivalent young adults, superior elderly showed decline in upper limits of function.}, language = {en} } @misc{BaltesKliegl1992, author = {Baltes, Paul B. and Kliegl, Reinhold}, title = {Further testing of limits of cognitive plasticity : negative age differences in a mnemonic skill are robust}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40373}, year = {1992}, abstract = {Earlier testing-the-limits research on age differences in cognitive plasticity of a memory skill was extended by 18 additional assessment and training sessions to explore whether older adults were able to catch up with additional practice and improved training conditions. The focus was on the method of loci, which requires mental imagination to encode and retrieve lists of words from memory in serial order. Of the original 37 subjects, 35 (16 young, ranging from 20 to 30 years of age, and 19 older adults, ranging from 66 to 80 years of age) participated in the follow-up study. Older adults showed sizable performance deficits when compared with young adults and tested for limits of reserve capacity. The negative age difference was substantial, resistant to extensive practice, and applied to all subjects studied. The primary origin for this negative age difference may be a loss in the production and use of mental imagination for operations of the mind.}, language = {en} } @misc{BaltesKliegl1988, author = {Baltes, Paul B. and Kliegl, Reinhold}, title = {Lernen und Ged{\"a}chtnis im Alter : {\"u}ber Plastizit{\"a}t und deren Grenzen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40277}, year = {1988}, abstract = {Ged{\"a}chtnish{\"o}chstleistungen sind auch im Alter m{\"o}glich. Dies konnte am Beispiel der »Methode der Orte« experimentell best{\"a}tigt werden. Hierbei hat sich gezeigt, daß das Gehirn {\"u}ber große kognitive Kapazit{\"a}tsreserven verf{\"u}gt. In einer speziellen Testmethode (»testing the limits«) zeigt sich aber im Hochleistungsbereich, trotz der grunds{\"a}tzlichen Plastizit{\"a}t, ein altersbezogenes Nachlassen der Ged{\"a}chtnismechanik. Offenbar gibt es biologische Grenzen in der Schnelligkeit der menschlichen Vorstellungskraft. Vielleicht gelingt es auf der Grundlage dieser Erkentnnis, einen zuverl{\"a}ssigen Markierungsindikator f{\"u}r das hirnphysiologische Altern zu finden. Daraus k{\"o}nnten sich auch neue Methoden zur Fr{\"u}herkennung von Demenzen ableiten lassen.}, language = {de} } @misc{BaltesSowarkaKliegl1989, author = {Baltes, Paul B. and Sowarka, Doris and Kliegl, Reinhold}, title = {Cognitive training research on fluid intelligence in old age : what can older adults achieve by themselves?}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40297}, year = {1989}, abstract = {Cognitive research on the plasticity of fluid intelligence has demonstrated that older adults benefit markedly from guided practice in cognitive skills and problem-solving strategies. We examined to what degree older adults are capable by themselves of achieving similar practice gains, focusing on the fluid ability of figural relations. A sample of 72 healthy older adults was assigned randomly to three conditions: control, tutor-guided training, self-guided training. Training time and training materials were held constant for the two training conditions. Posttraining performances were analyzed using a transfer of training paradigm in terms of three indicators: correct responses, accuracy, and level of item difficulty. The training programs were effective and produced a significant but narrow band of within-ability transfer. However, there was no difference between the two training groups. Older adults were shown to be capable of producing gains by themselves that were comparable to those obtained following tutor-guided training in the nature of test-relevant cognitive skills.}, language = {en} } @article{SchroederWuerznerHeisteretal.2015, author = {Schroeder, Sascha and W{\"u}rzner, Kay-Michael and Heister, Julian and Geyken, Alexander and Kliegl, Reinhold}, title = {childLex: a lexical database of German read by children}, series = {Behavior research methods : a journal of the Psychonomic Society}, volume = {47}, journal = {Behavior research methods : a journal of the Psychonomic Society}, number = {4}, publisher = {Springer}, address = {New York}, issn = {1554-351X}, doi = {10.3758/s13428-014-0528-1}, pages = {1085 -- 1094}, year = {2015}, abstract = {This article introduces childLex, an online database of German read by children. childLex is based on a corpus of children's books and comprises 10 million words that were syntactically annotated and lemmatized. childLex reports linguistic norms for lexical, superlexical, and sublexical variables in three different age groups: 6-8 (grades 1-2), 9-10 (grades 3-4), and 11-12 years (grades 5-6). Here, we describe how childLex was collected and analyzed. In addition, we provide information about the distributions of word frequency, word length, and orthographic neighborhood size, as well as their intercorrelations. Finally, we explain how childLex can be accessed using a Web interface.}, language = {en} } @misc{BaltesKliegl1986, author = {Baltes, Paul B. and Kliegl, Reinhold}, title = {On the dynamics between growth and decline in the aging of intelligence and memory}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41116}, year = {1986}, abstract = {Content: - Different Intellectual Abilities Age Differently - Cultural Change and Interindividual Variability in Aging - Cognitive Intervention Research on Plasticity in Old Age * Psychological Evidence * Brain-Physiological Evidence - Age Differences and Testing-the-Limits - Conclusions - Summary}, language = {en} } @misc{KlieglBaltes1987, author = {Kliegl, Reinhold and Baltes, Paul B.}, title = {Das Janusgesicht des Alters : {\"u}ber Wachstum und Abbau in Intelligenz und Ged{\"a}chtnis}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41096}, year = {1987}, abstract = {Vier Forschungsans{\"a}tze im Bereich der Altersintelligenz und des Altersged{\"a}chtnisses werden referiert: Untersuchungen (1) Uber unterschiedliche Altersverl{\"a}ufe intellektueller und kognitiver Prozesse, (2) {\"u}ber interindividuelle Variabilit{\"a}t und historischen Wandel, (3) {\"u}ber Plastizit{\"a}t und Reservekapazit{\"a}t und (4) {\"u}ber Leistungsgrenzen. Das Wesen der Altersintelligenz ersch{\"o}pft sich nicht in einem Prozeß des Leistungsabfalls. Vielmehr treten sowohl Wachstum als auch Abbau und komplexe Wechselwirkungen zwischen beidem auf. Altersbedingter Abbau zeigt sich am ehesten an den Leistungsgrenzen der Grundmechanismen der Intelligenz. Wachstum kann in jenen Bereichen stattfinden, in denen Menschen Wissenssysteme weiterentwickeln und {\"u}ben (Pragmatik der Intelligenz). Die Methode des Belastungstests (Testing-the-Limits oder Grenztesten) wird als eine Strategie vorgestellt, mit deren Hilfe Mechanismen positiver und negativer Ver{\"a}nderungen beim kognitiven Altern bestimmt werden k{\"o}nnen. Die Anwendung des kognitiven Belastungstests wird f{\"u}r die neuropsychologische Forschung, beispielsweise f{\"u}r Untersuchungen {\"u}ber die Altersdemenz, empfohlen.}, language = {de} } @misc{OlsonKlieglDavidson1983, author = {Olson, Richard K. and Kliegl, Reinhold and Davidson, Brian J.}, title = {Dyslexic and normal readers' eye movements}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41071}, year = {1983}, abstract = {Dyslexic and normal readers' eye movements were compared while tracking a moving fixation point and in reading. Contrary to previous reports, the dyslexic and normal readers did not differ in their number of saccades, percentage of regressions, or stability of fixations in the tracking task. Thus, defective oculomotor control was not associated with or a causal factor in dyslexia, and the dyslexics' abnormal eye movements in reading must be related to differences in higher cognitive processes. However, individual differences in oculmotor efficiency, independent of reading ability, were found within both the dyslexic and normal groups, and these differences were correlated in reading and tracking tasks.}, language = {en} } @misc{KlieglMayrKrampe1995, author = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, R. T.}, title = {Process dissociations in cognitive aging}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40428}, year = {1995}, abstract = {One undisputed finding of cognitive aging research is that the two main clusters of intellectual abilities, fluid and crystallized abilities, exhibit differential age-related trends. Healthy older adults perform less well than young adults on almost any task that requires fast responses or taps the fluid or mechanical aspects of intelligence; they show much less of a decline, if any at all, in tasks requiring the access of their crystallized knowledge (Baltes, 1987; Horn, 1970). These age-differential trends are the prototype of what we will refer to as a process dissociation. We will show how process dissociations can be established within the domain of fluid intelligence that pass more stringent tests than is customary in experimental research on cognitive aging.}, language = {en} } @misc{SimonCabreraKliegl1993, author = {Simon, Tony and Cabrera, Angel and Kliegl, Reinhold}, title = {A new approach to the study of subitizing as distinct enumeration processing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41083}, year = {1993}, abstract = {This paper presents a new methodology for examining the phenomenon of subitizing. Subjects were presented with a standard numerosity-detection task but for a range of presentation times to allow Task-Accuracy Functions to be computed for individual subjects. The data appear to show a continuous change in processing for numerosities from 2 to 5 when the data are aggregated across subjects. At the level of individual subjects, there appear to be qualitative shifts in enumeration processing after 3 or 4 objects. The approach used in this experiment may be used to test the claim that subitizing is a distinct enumeration process that can be used for small numbers of objects.}, language = {en} } @misc{KlieglSmithLindenbergeretal.1993, author = {Kliegl, Reinhold and Smith, Jacqui and Lindenberger, Ulman and Mayr, Ulrich and Krampe, Ralf and Baltes, Paul B.}, title = {Max-Planck-Institut f{\"u}r Bildungsforschung Berlin}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41124}, year = {1993}, language = {de} } @misc{KlieglVolbrechtWerner1984, author = {Kliegl, Reinhold and Volbrecht, Vicki J. and Werner, John S.}, title = {Influences of variation in lenticular and macular pigmentation on dichromatic neutral points}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41101}, year = {1984}, abstract = {Protanopie, deuteranopic and tritanopic neutral points were computed by determining the wavelength of light that produced the same quantal-catch ratio in the photopigments as that produced by a broad-band light of specified color temperature (range: 2 800—6 600 K). The Vos-Walraven primaries were used as photopigment absorption spectra that were screened by varying densities of ocular (0.5—2.5 at 400 nm) and macular (0.0—1.0 at 460 nm) pigmentation. The computations were carried out in 1 nm steps for the wavelength range of 380 to 720 nm. Most of the empirically determined mean, neutral-point loci in the literature were predicted from these computations to within 1—2nm when average ocular and macular pigment densities were used. The neutral-point range associated with the extreme values of the prereceptoral screening pigments was up to 25 nm for protanopes and deuteranopes and up to 13 nm for tritanopes.}, language = {en} } @misc{Kliegl1984, author = {Kliegl, Reinhold}, title = {Ein Beitrag zur Binnenstruktur des Freundschaftsverst{\"a}ndnisses}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-19929}, year = {1984}, language = {de} } @misc{MayrKliegl1993, author = {Mayr, Ulrich and Kliegl, Reinhold}, title = {Sequential and coordinative complexity : age-based processing limitations in figural transformations}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40416}, year = {1993}, abstract = {Dimensions of cognitive complexity in figural transformations were examined in the context of adult age differences. Sequential complexity was manipulated through figural transformations of single objects in a multiple-object array. Coordinative complexity was induced through spatial or nonspatial transformations of the entire array. Results confirmed the prediction that age-related slowing is larger in coordinative complexity than in sequential complexity conditions. The effect was stable across 8 sessions (Experiment 1), was obtained when age groups were equated in accuracy with criterion-referenced testing (Experiment 2), and was corroborated by age-differential probabilities of error types (Experiments 1 and 2). A model is proposed attributing age effects under coordinative complexity to 2 factors: (a) basic-level slowing and (b) time-consuming reiterations through the processing sequence due to age-related working memory failures.}, language = {en} } @misc{DimigenValsecchiSommeretal.2009, author = {Dimigen, Olaf and Valsecchi, Matteo and Sommer, Werner and Kliegl, Reinhold}, title = {Human Microsaccade-Related Visual Brain Responses}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-56923}, year = {2009}, abstract = {Microsaccades are very small, involuntary flicks in eye position that occur on average once or twice per second during attempted visual fixation. Microsaccades give rise to EMG eye muscle spikes that can distort the spectrum of the scalp EEG and mimic increases in gamma band power. Here we demonstrate that microsaccades are also accompanied by genuine and sizeable cortical activity, manifested in the EEG. In three experiments, high-resolution eye movements were corecorded with the EEG: during sustained fixation of checkerboard and face stimuli and in a standard visual oddball task that required the counting of target stimuli. Results show that microsaccades as small as 0.15° generate a field potential over occipital cortex and midcentral scalp sites 100 -140 ms after movement onset, which resembles the visual lambda response evoked by larger voluntary saccades. This challenges the standard assumption of human brain imaging studies that saccade-related brain activity is precluded by fixation, even when fully complied with. Instead, additional cortical potentials from microsaccades were present in 86\% of the oddball task trials and of similar amplitude as the visual response to stimulus onset. Furthermore, microsaccade probability varied systematically according to the proportion of target stimuli in the oddball task, causing modulations of late stimulus-locked event-related potential (ERP) components. Microsaccades present an unrecognized source of visual brain signal that is of interest for vision research and may have influenced the data of many ERP and neuroimaging studies.}, language = {en} }