Eye movements in reading and information processing: 20 years of research.

Rayner, Keith · 1998 · OpenAlex-citations

DOI: 10.1037/0033-2909.124.3.372

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Summary

This review article synthesizes two decades of research on eye movements in reading and other information processing tasks, such as music reading, typing, visual search, and scene perception. The primary motivation is to demonstrate that eye movement data provide a window into moment-to-moment cognitive processes. The author argues that the field has entered a "third era" of research, characterized by technological advancements in eye-tracking systems and the development of eye-contingent display paradigms, which allow for more accurate and innovative experimental designs than previous eras. The paper examines several core topics regarding eye movement characteristics. It details the mechanics of saccades (rapid eye movements) and fixations (periods of relative stillness lasting 200–300 ms), noting that saccadic suppression prevents the perception of blur during movement. The review discusses saccade latency, finding that it is influenced by cognitive factors, such as the complexity of the task or the presence of visual cues, rather than being purely reflexive. It also addresses the relationship between attention and eye movements, suggesting that while they can be decoupled in simple tasks, they are tightly linked in complex tasks like reading. The text further explores developmental changes, noting that children and elderly adults exhibit different saccade latencies and accuracies compared to young adults. Regarding reading specifically, the review outlines distinct patterns: mean fixation durations are approximately 225 ms for silent reading, with saccades covering about 7–9 letter spaces. The probability of fixating a word is influenced by its length and frequency; function words are skipped more often than content words. Regressions (right-to-left movements) occur in 10–15% of saccades, often serving to correct overshoots or resolve comprehension difficulties. The author emphasizes that variability in fixation duration and saccade length reflects on-line linguistic processing rather than mere motor noise. For instance, fixation duration correlates with word frequency and processing difficulty, and there is no correlation between fixation duration and saccade length in reading, unlike in non-linguistic tasks. The significance of this work lies in establishing eye movements as a robust tool for inferring cognitive processes. The review concludes that eye movement records capture the dynamics of information processing, allowing researchers to examine how readers integrate information across saccades and control their eye movements based on textual and typographical variables. By reviewing peer-reviewed studies from the past 20 years, the paper provides a comprehensive framework for understanding how eye behavior reflects the underlying mechanics of reading and information processing, highlighting the utility of eye-tracking in cognitive psychology.

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• eye movements scanning