文章基本信息

标题：Speed and accuracy of dyslexic versus typical word recognition: an eye-movement investigation
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作者：Kunert, Richard ; Scheepers, Christoph
期刊名称：Frontiers in Psychology
电子版ISSN：1664-1078
出版年度：2014
卷号：5
页码：1-16
DOI：10.3389/fpsyg.2014.01129
出版社：Frontiers Media
摘要：Developmental dyslexia is often characterized by a dual deficit in both word recognition accuracy and general processing speed. While previous research into dyslexic word recognition may have suffered from speed-accuracy trade-off, the present study employed a novel eye-tracking task that is less prone to such confounds. Participants (10 dyslexics and 12 controls) were asked to look at real word stimuli, and to ignore simultaneously presented non-word stimuli, while their eye-movements were recorded. Improvements in word recognition accuracy over time were modeled in terms of a continuous non-linear function. The words’ rhyme consistency and the non-words’ lexicality (unpronounceable, pronounceable, pseudohomophone) were manipulated within-subjects. Speed-related measures derived from the model fits confirmed generally slower processing in dyslexics, and showed a rhyme consistency effect in both dyslexics and controls. In terms of overall error rate, dyslexics (but not controls) performed less accurately on rhyme-inconsistent words, suggesting a representational deficit for such words in dyslexics. Interestingly, neither group showed a pseudohomophone effect in speed or accuracy, which might call the task-independent pervasiveness of this effect into question. The present results illustrate the importance of distinguishing between speed- versus accuracy-related effects for our understanding of dyslexic word recognition.
关键词：visual word recognition; Dyslexia; Speed-accuracy trade-off; Consistency; phonology