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Binocular eye-movements of dyslexic readers: Prioritising the abducting eye and purposeful movements within a fixation

Research output: Contribution to journalMeeting abstract

Original languageEnglish
Pages (from-to)308-308
Number of pages1
JournalJournal of Eye Movement Research
Volume4
Issue number3
Publication statusPublished - 2011

Abstract

We present details of the largest database of binocular eye-movements in reading by UK dyslexic university students, reading 5000 words of multi-line text and using monocular calibration. We profile their performance on a range of cognitive and linguistic tasks, and present initial analyses of their eye-movements compared with those of more typical readers of the same corpus. We describe participants’ binocular behaviours within a fixation, asking how readers solve the problem of making the two eyes (with their mirror-image musculatures) move optimally. As an example of our analyses, 85% and 82% of non-dyslexic and dyslexic participants, respectively, converged in front of the plane of the text; we explored these fixations according to spatial direction of movement of each eye within the fixation. Within individual fixations both eyes moved to the right, with the right (abducting) eye behaving similarly for both reading groups. However, dyslexics' left eye movements showed a more variable profile, making a significant proportion of movements to the left. Such analyses do not specifically identify visuomotor causes of dyslexia; rather, they describe the results of dyslexic readers optimising their available resources, both visuomotor and cognitive.

ID: 4634337