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Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

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Published on: November 30, 2018

Parafoveal preview differentially modulates word frequency and contextual predictability effects during reading.

Sara C Sereno^1,2,3, Christopher J Hand^4,5,6, Aisha Shahid^7,8

¹School of Psychology & Neuroscience, University of Glasgow, Glasgow, UK.

Journal of Vision

|February 19, 2026

Summary

Eye movement research shows word frequency and context predictability interact with parafoveal preview during reading. This suggests distinct mechanisms for lexical access and contextual integration, influenced by visual information.

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Area of Science:

Cognitive Psychology
Psycholinguistics
Computational Neuroscience

Background:

Decades of research on reading eye movements have not fully elucidated the interplay between lexical and semantic factors.
Understanding how word frequency, contextual predictability, and parafoveal information influence reading is crucial for cognitive models of language processing.

Purpose of the Study:

To investigate the simultaneous effects of word frequency, contextual predictability, and parafoveal preview on reading behavior.
To determine how these factors interact and influence fixation durations and word skipping during text processing.

Main Methods:

A repeated-measures design with 80 participants reading passages containing target words.
Bayesian mixed-effects models analyzed fixation times and skipping measures using corpus-based word frequencies and Cloze predictabilities.
Manipulated parafoveal preview validity (valid vs. invalid).

Main Results:

Significant main effects of frequency, predictability, and preview validity were observed.
Interactions revealed that frequency effects were amplified by invalid previews, aiding corrective processing.
Predictability effects were stronger with valid previews, highlighting the role of parafoveal input in contextual integration.

Conclusions:

Lexical access and contextual integration appear to operate via distinct mechanisms, as evidenced by the lack of interaction between frequency and predictability.
Parafoveal information critically modulates the influence of both lexical and contextual factors during reading.
Findings contribute to a deeper understanding of the dynamic interplay of visual and cognitive processes in skilled reading.