@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{KlieglMayrKrampe1994,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf},
  title     = {Time-accuracy functions for determining process and person differences : an application to cognitive aging},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17101},
  year      = {1994},
  abstract  = {A paradigm for the determination of time-accuracy functions (TAFs) for individual participants is introduced for two pairs of tasks differing in cognitive complexity, that is, word scanning vs cued recognition and figural scanning vs figural reasoning. TAFs can be used to test dissociations of cognitive processes beyond scale-related ambiguities of ordinal interactions. The approach is applied to examine the cognitive-aging hypothesis that a single slowing factor can account for interactions between adult age and cognitive task complexity. Twenty young and 20 old adults participated in 17 sessions. Presentation times required for 75, 87.5, and 100\% accuracies were determined for each task with a variant of the psychophysical method of limits. Accuracy was fit by negatively accelerated functions of presentation time. State-trace analyses showed that different slowing factors are required for high- and low-complexity tasks. Relations to speed-accuracy and performance-resource functions are discussed.},
  language  = {en}
}
@misc{Kliegl1995,
  author    = {Kliegl, Reinhold},
  title     = {From presentation time to processing time : a psychopchysics approach to episodic memory},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-40438},
  year      = {1995},
  abstract  = {Manipulations of presentation time have a long history in research on the development of memory, with a number of paradoxical results deriving from methodological shortcomings as well as from insufficient theoretical specifications. After a look at some of the problems in earlier research, a psychophysics approach to investigate episodic memory functions is presented in which criterion-referenced manipulation of presentation time is used to estimate the effects of experimental manipulations and the effects of individual differences. Criterion'referenced presentation time (CRPT), defined as the time required to score at an a priori specified level of accuracy, is interpreted as a preliminary indicator of internal processing time. CRPTs are shown to be valid predictors of traditional measures of memory accuracy. Moreover, an extension of this psychophysics approach yields estimates of complete condition-specific timeaccuracy functions and of function-specific processing times (plus other parameters) for individual subjects. It is argued that both from a cognitive and a developmental perspective it is often advantageous to trade experimental equivalence in presentation times for functional equivalence in accuracy of performance; this applies not only to episodic memory processes.},
  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{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{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}
}
@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{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{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{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{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{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{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}
}
@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{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{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{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{BaltesDittmannKohliKliegl1986,
  author    = {Baltes, Paul B. and Dittmann-Kohli, Freya and Kliegl, Reinhold},
  title     = {Reserve capacity of the elderly in aging-sensitive tests of fluid intelligence : replication and extension},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39939},
  year      = {1986},
  abstract  = {Fluid intelligence belongs to that cluster of intellectual abilities evincing aging loss. To examine further the range of intellectual reserve available to aging individuals and the question of replicability in a new cultural and laboratory setting, 204 healthy older adults (mean age = 72 years; range = 60-86) participated in a short-term longitudinal training study. For experimental subjects, 10 sessions consisted of cognitive training involving two subability tests (Figural Relations, Induction) of fluid intelligence. The pattern of outcomes replicates and expands on earlier studies. Older adults have the reserve to evince substantial increases in levels of performance in fluid intelligence tests. Transfer of training, however, is narrow in scope. Training also increases accuracy of performance and the ability to solve more difficult test items. Difficulty level was estimated in a separate study, with a comparable sample of N = 112 elderly adults. Future research is suggested to examine whether intellectual reserve extends to near-maximum levels of performance.},
  language  = {en}
}
@misc{OlsonKlieglDavidsonetal.1985,
  author    = {Olson, Richard K. and Kliegl, Reinhold and Davidson, Brian J. and Foltz, Gregory},
  title     = {Individual and developmental differences in reading disability},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39916},
  year      = {1985},
  abstract  = {I. Introduction A. Theoretical Framework and Selection of Tests B. Related Studies of Reading Disability Subtypes C. Overview of Specific Questions and Article Outline II. Selection criteria nd performance on standardized measures III. Group differences between disabled and normal readers A. Phonetic Memory B. Picture-Naming Speed and Automatic Responses to Print C. Phonological and Orthographic Skill D. Easy Regular and Exception Word Reading E. Difficult Regular and Exception Words IV. Individual diferences in reading disability A. Phonological Skill, Orthographic Skill, and the Regularity Effect B. Phonological Skill, Orthographic Skill, and Spelling Errors V. Eye movement reading style A. The "Plodder-Explorer" Dimension of Eye Movement Reading Style B. Eye Movements, Coding Skills, and Spelling Ratings C. Verbal Intelligence and the Plodder-Explorer Dimension D. Eye Movements in a Nonreading Task and the "Visual-Spatial" Subtype VI. Distribution and etiology of reading disabilities A. Distribution Issues B. Etiology of Reading Disabilities VII. Summary and new directions in research},
  language  = {en}
}
@misc{Kliegl1984,
  author    = {Kliegl, Reinhold},
  title     = {EMAN : a modular and iterative eye-movement analysis program},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39909},
  year      = {1984},
  abstract  = {EMAN is an eye-movement analysis program that consists of four modules. The first module rescales eye positions to coordinates of the display. The second and third modules reduce data to a fixation format and identify areas of bad measurement by means of iterative passes over the data. In the fourth module iterative algorithms are employed for the identification of line numbers and for achieving congruence between fixations and display.},
  language  = {en}
}
@misc{KlieglOlsonDavidson1983,
  author    = {Kliegl, Reinhold and Olson, Richard K. and Davidson, Brian J.},
  title     = {On problems of unconfounding perceptual and language processes},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39890},
  year      = {1983},
  abstract  = {Contents: I. Introduction II. Word Length and Word Frequency III. Preferred and Convenient Viewing Position IV. Influences across Words A. Serial Dependencies B. Lack of Saccadic Resilience V. Conclusion},
  language  = {en}
}
@misc{OlsonKlieglDavidson1983,
  author    = {Olson, Richard K. and Kliegl, Reinhold and Davidson, Brian J.},
  title     = {Eye Movements in Reading Disability},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39880},
  year      = {1983},
  abstract  = {Contents: I. Introduction II. Word Coding Processes A. Word Recognition B. Orthographic Coding C. Phonological Coding III. Eye Monitor and Reading Task IV. Group Differences V. Dimensions of Individual Differences A. Regressive Fixation Index and Word Recognition B. Regressive Fixation Index and IQ C. Regressive Fixation Index and Saccade Length D. Regressive Fixation Index and Relative Phonological Skill VI. Multiple Regression Models of Individual Differences A. Disabled Readers in the Aloud Condition B. Disabled Readers in the Silent Condition C. Normal Readers in Silent and Aloud Conditions VII. Conclusions},
  language  = {en}
}
@misc{KlieglOlson1981,
  author    = {Kliegl, Reinhold and Olson, Richard K.},
  title     = {Reduction and calibration of eye monitor data},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39875},
  year      = {1981},
  abstract  = {The present paper presents FORTRAN programs for reducing eye monitor output to fixations and for mapping these fixations to locations in the stimulus space. Flexible parameters of the fixations program allow for determination of the beginning and end of fixations under different resolution criteria and for indicating loss of accurate measurement. The calibration program is based on a rectangular 9-point fixation grid. Each fixation is rescaled within this grid by solving for a quadratic equation. The rescaled values are output in a flexibly determined rectangular coordinate system that is related to the stimulus space, such as character position on the screen. The programs were developed for the 60-Hz Applied Sciences corneal reflection eye monitor, but they may be used with a number of other systems.},
  language  = {en}
}
@misc{Kliegl1981,
  author    = {Kliegl, Reinhold},
  title     = {Automated and interactive analysis of eye fixation data in reading},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39861},
  year      = {1981},
  abstract  = {A package of five FORTRAN programs that provides for fast user-controlled analyses of reading eye fixations is described. The package requires the data to be in a fixation format and to be rescaled to screen dimensions. OLDEYE identifies six types of fixations and calculates descriptive statistics on each of them, on their associated saccades, and on their average pupil diameter. CONVRT represents the text as a string of words that can be coded according to experimentally relevant variables. PLTFIX prints fixation durations by letter position and sequence of occurrence. MODDAT is an interactive program for marking parts of the text in which the data quality is below acceptable standards. It also allows the correction of systematic errors due to calibration or drift. MATCH combines the outputs from OLDEYE, CONVRT, and MODDAT and calculates 11 dependent measures for every word. The output of MATCH is suitable for input to conventional multivariate statistical programs.},
  language  = {en}
}
@misc{WernerCiceroneKliegletal.1984,
  author    = {Werner, John S. and Cicerone, Carola M. and Kliegl, Reinhold and DellaRosa, Denise},
  title     = {Spectral efficiency of blackness induction},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16897},
  year      = {1984},
  abstract  = {The spectral efficiency of blackness induction was measured in three normal trichromatic observers and in one deuteranomalous observer. The psychophysical task was to adjust the radiance of a monochromatic 60-120′ annulus until a 45′ central broadband field just turned black and its contour became indiscriminable from a dark surrounding gap that separated it from the annulus. The reciprocal of the radiance required to induce blackness with annulus wavelengths between 420 and 680 nm was used to define a spectral-efficiency function for the blackness component of the achromatic process. For each observer, the shape of this blackness-sensitivity function agreed with the spectral-efficiency function based on heterochromatic flicker photometry when measured with the same 60-120′ annulus. Both of these functions matched the Commission Internationale de l'Eclairage Vλ function except at short wavelengths. Ancillary measurements showed that the latter difference in sensitivity can be ascribed to nonuniformities of preretinal absorption, since the annular field excluded the central 60′ of the fovea. Thus our evidence indicates that, at least to a good first approximation, induced blackness is inversely related to the spectral-luminosity function. These findings are consistent with a model that separates the achromatic and the chromatic pathways.},
  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}
}
@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{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}
}
@unpublished{EngbertScheffczykKrampeetal.1997,
  author    = {Engbert, Ralf and Scheffczyk, Christian and Krampe, Ralf-Thomas and Rosenblum, Mikhael and Kurths, J{\"u}rgen and Kliegl, Reinhold},
  title     = {Tempo-induced transitions in polyrhythmic hand movements},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14380},
  year      = {1997},
  abstract  = {We investigate the cognitive control in polyrhythmic hand movements as a model paradigm for bimanual coordination. Using a symbolic coding of the recorded time series, we demonstrate the existence of qualitative transitions induced by experimental manipulation of the tempo. A nonlinear model with delayed feedback control is proposed, which accounts for these dynamical transitions in terms of bifurcations resulting from variation of the external control parameter. Furthermore, it is shown that transitions can also be observed due to fluctuations in the timing control level. We conclude that the complexity of coordinated bimanual movements results from interactions between nonlinear control mechanisms with delayed feedback and stochastic timing components.},
  language  = {en}
}