TY - JOUR A1 - Liang, Jin-Rong A1 - Moshel, Shay A1 - Zivotofsky, Ari Z. A1 - Caspi, Avi A1 - Engbert, Ralf A1 - Kliegl, Reinhold A1 - Havlin, Shlomo T1 - Scaling of horizontal and vertical fixational eye movements N2 - Eye movements during fixation of a stationary target prevent the adaptation of the visual system to continuous illumination and inhibit fading of the image. These random, involuntary, small movements are restricted at long time scales so as to keep the target at the center of the field of view. Here we use detrended fluctuation analysis in order to study the properties of fixational eye movements at different time scales. Results show different scaling behavior between horizontal and vertical movements. When the small ballistic movements, i.e., microsaccades, are removed, the scaling exponents in both planes become similar. Our findings suggest that microsaccades enhance the persistence at short time scales mostly in the horizontal component and much less in the vertical component. This difference may be due to the need for continuously moving the eyes in the horizontal plane, in order to match the stereoscopic image for different viewing distances Y1 - 2005 SN - 1063-651X ER - TY - JOUR A1 - Li, Nan A1 - Wang, Suiping A1 - Mo, Luxi A1 - Kliegl, Reinhold T1 - Contextual constraint and preview time modulate the semantic preview effect BT - evidence from Chinese sentence reading JF - The quarterly journal of experimental psychology N2 - 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). KW - Semantic preview benefit KW - contextual constraint KW - word process KW - reading Y1 - 2018 U6 - https://doi.org/10.1080/17470218.2017.1310914 SN - 1747-0218 SN - 1747-0226 VL - 71 IS - 1 SP - 241 EP - 249 PB - Sage Publ. CY - London ER - TY - JOUR A1 - Laurinavichyute, Anna A1 - Sekerina, Irina A. A1 - Alexeeva, Svetlana A1 - Bagdasaryan, Kristine A1 - Kliegl, Reinhold T1 - Russian Sentence Corpus: Benchmark measures of eye movements in reading in Russian JF - Behavior research methods : a journal of the Psychonomic Society N2 - 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/. KW - Reading KW - Eye movements KW - Russian KW - Ambiguity KW - Part of speech KW - Corpus Y1 - 2019 U6 - https://doi.org/10.3758/s13428-018-1051-6 SN - 1554-351X SN - 1554-3528 VL - 51 IS - 3 SP - 1161 EP - 1178 PB - Springer CY - New York ER - TY - JOUR A1 - Laubrock, Jochen A1 - Kliegl, Reinhold A1 - Rolfs, Martin A1 - Engbert, Ralf T1 - When do microsaccades follow spatial attention? N2 - 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. Y1 - 2010 UR - http://app.psychonomic-journals.org/ U6 - https://doi.org/10.3758/APP.72.3.683 SN - 1943-3921 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Kliegl, Reinhold A1 - Engbert, Ralf T1 - SWIFT explorations of age differences in eye movements during reading Y1 - 2006 UR - http://www.sciencedirect.com/science/journal/01497634 U6 - https://doi.org/10.1016/j.neubiorev.2006.06.013 SN - 0149-7634 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Kliegl, Reinhold T1 - The eye-voice span during reading aloud JF - Frontiers in psychology N2 - 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. KW - reading KW - eye movements KW - eye-voice span KW - synchronization KW - working memory updating KW - psychologinguistics Y1 - 2015 U6 - https://doi.org/10.3389/fpsyg.2015.01432 SN - 1664-1078 VL - 6 IS - 1432 PB - Frontiers Research Foundation CY - Lausanne ER - TY - JOUR A1 - Laubrock, Jochen A1 - Kliegl, Reinhold T1 - The eye-voice span during reading aloud JF - Frontiers in psychology N2 - 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. KW - reading KW - eye movements KW - eye-voice span KW - synchronization KW - working memory updating KW - psychologinguistics Y1 - 2015 U6 - https://doi.org/10.3389/fpsyg.2015.01437 SN - 1664-1078 VL - 6 PB - Frontiers Research Foundation CY - Lausanne ER - TY - GEN A1 - Laubrock, Jochen A1 - Kliegl, Reinhold T1 - The eye-voice span during reading aloud N2 - 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. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 283 KW - reading KW - eye movements KW - eye-voice span KW - synchronization KW - working memory updating KW - psycholinguistics Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-86904 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Engbert, Ralf A1 - Rolfs, Martin A1 - Kliegl, Reinhold T1 - Microsaccades are an index of covert attention : commentary on Horowitz, Fine, Fencsik, Yurgenson and Wolfe Y1 - 2007 UR - http://pss.sagepub.com/ U6 - https://doi.org/10.1111/j.1467-9280.2007.01904.x SN - 0956-7976 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - Microsaccade dynamics during covert attention N2 - We compared effects of covert spatial-attention shifts induced with exogenous or endogenous cues on microsaccade rate and direction. Separate and dissociated effects were obtained in rate and direction measures. Display changes caused microsaccade rate inhibition, followed by sustained rate enhancement. Effects on microsaccade direction were differentially tied to cue class (exogenous vs. endogenous) and type (neutral vs. directional). For endogenous cues, direction effects were weak and occurred late. Exogenous cues caused a fast direction bias towards the cue (i.e., early automatic triggering of saccade programs), followed by a shift in the opposite direction (i.e, controlled inhibition of cue-directed saccades, leading to a 'leakage' of microsaccades in the opposite direction). (C) 2004 Elsevier Ltd. All rights reserved Y1 - 2005 SN - 0042-6989 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - Microsaccade rate during (un)ambiguous apparent motion Y1 - 2005 SN - 0301-0066 ER - TY - JOUR A1 - Laubrock, Jochen A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - Fixational eye movements predict the perceived direction of ambiguous apparent motion N2 - Neuronal activity in area LIP is correlated with the perceived direction of ambiguous apparent motion (Z. M. Williams, J. C. Elfar, E. N. Eskandar, L. J. Toth, & J. A. Assad, 2003). Here we show that a similar correlation exists for small eye movements made during fixation. A moving dot grid with superimposed fixation point was presented through an aperture. In a motion discrimination task, unambiguous motion was compared with ambiguous motion obtained by shifting the grid by half of the dot distance. In three experiments we show that (a) microsaccadic inhibition, i.e., a drop in microsaccade frequency precedes reports of perceptual flips, (b) microsaccadic inhibition does not accompany simple response changes, and (c) the direction of microsaccades occurring before motion onset biases the subsequent perception of ambiguous motion. We conclude that microsaccades provide a signal on which perceptual judgments rely in the absence of objective disambiguating stimulus information. Y1 - 2008 UR - http://www.journalofvision.org/content/by/year U6 - https://doi.org/10.1167/8.14.13 SN - 1534-7362 ER - TY - GEN A1 - Kuperman, Victor A1 - Dambacher, Michael A1 - Nuthmann, Antje A1 - Kliegl, Reinhold T1 - The effect of word position on eye-movements in sentence and paragraph reading N2 - The present study explores the role of the word position-in-text in sentence and paragraph reading. Three eye-movement data sets based on the reading of Dutch and German unrelated sentences reveal a sizeable, replicable increase in reading times over several words in the beginning and the end of sentences. The data from the paragraphbased English-language Dundee corpus replicate the pattern and also indicate that the increase in inspection times is driven by the visual boundaries of the text organized in lines, rather than by syntactic sentence boundaries. We argue that this effect is independent of several established lexical, contextual and oculomotor predictors of eye-movement behavior. We also provide evidence that the effect of word position-intext has two independent components: a start-up effect arguably caused by a strategic oculomotor program of saccade planning over the line of text, and a wrap-up effect originating in cognitive processes of comprehension and semantic integration. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 235 KW - eye movements KW - word processing KW - sentence processing Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-56828 ER - TY - JOUR A1 - Krems, J. A1 - Johnson, T. A1 - Kliegl, Reinhold T1 - Kognitive Komplexität und abduktives Schließen : Evaluation eines Computermodells Y1 - 1997 SN - 3-8244-4229-9 ER - TY - JOUR A1 - Krampe, Ralf-Thomas A1 - Kliegl, Reinhold A1 - Mayr, Ulrich A1 - Engbert, Ralf A1 - Vorberg, D. T1 - The fast and the slow of skilled bimanual rhythm production : parallel versus integrated timing Y1 - 2000 ER - TY - JOUR A1 - Krampe, Ralf-Thomas A1 - Engbert, Ralf A1 - Kliegl, Reinhold A1 - Kurths, Jürgen T1 - Koordination und Synchronisation der Hände beim rhythmischen Timing Y1 - 2000 ER - TY - JOUR A1 - Krampe, Ralf-Thomas A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - Representational models and nonlinear dynamics : irreconcilable approaches to human movement timing and coordination or two sides of the same coin? : Introduction to the special issue on movement timing and coordination Y1 - 2002 ER - TY - JOUR A1 - Krampe, Ralf-Thomas A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - The effects of expertise and age on rhythm production : adaptations to timing and sequencing constraints Y1 - 2002 ER - TY - JOUR A1 - Krampe, Ralf-Thomas A1 - Engbert, Ralf A1 - Kliegl, Reinhold T1 - Age-specific problems in rhythmic timing Y1 - 2001 ER - TY - GEN A1 - Kliegl, Reinhold A1 - Wei, Ping A1 - Dambacher, Michael A1 - Yan, Ming A1 - Zhou, Xiaolin T1 - Experimental effects and individual differences in linear mixed models: Estimating the relationship between spatial, object, and attraction effects in visual attention N2 - Linear mixed models (LMMs) provide a still underused methodological perspective on combining experimental and individual-differences research. Here we illustrate this approach with two-rectangle cueing in visual attention (Egly et al., 1994). We replicated previous experimental cue-validity effects relating to a spatial shift of attention within an object (spatial effect), to attention switch between objects (object effect), and to the attraction of attention toward the display centroid (attraction effect), also taking into account the design-inherent imbalance of valid and other trials. We simultaneously estimated variance/covariance components of subject-related random effects for these spatial, object, and attraction effects in addition to their mean reaction times (RTs). The spatial effect showed a strong positive correlation with mean RT and a strong negative correlation with the attraction effect. The analysis of individual differences suggests that slow subjects engage attention more strongly at the cued location than fast subjects. We compare this joint LMM analysis of experimental effects and associated subject-related variances and correlations with two frequently used alternative statistical procedures T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - paper 236 KW - linear mixed model KW - individual differences KW - visual attention KW - spatial attention KW - object-based attention Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-56859 ER -