Acquisition of a rich annotated corpus of binocular eye-movements from dyslexic readers

Lead Research Organisation: University of Edinburgh
Department Name: Psychology

Abstract

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Publications

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Richard Shillcock (Author) (2010) Principles in the computational modelling of eye-movements in reading in Perception

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Richard Shillcock (Author) (2011) Multiple models and multiple perspectives approaches in modelling eye-movements in reading in Journal of Eye Movement Research

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Shillcock R (2012) Some issues in computational modelling: Occam's Razor and Hegel's hair gel.

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Shillcock R (2010) Binocular foveation in reading. in Attention, perception & psychophysics

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Shillcock R (2013) The Concrete Universal and Cognitive Science in Axiomathes

 
Description The dyslexics made more and longer fixations, and some of them made more regressive fixations, compared with the typical readers. Dyslexic and typical readers behaved comparably in that the final binocular disparity within a fixation was about 90% of the initial disparity.We have concentrated on exploring the movements of the two eyes within fixations. We have discovered that in dyslexics there are more directionally variable horizontal movements, particularly left-to-right ones, compared with more typical readers, and beginning from a more leftward position within the word. Dyslexic reader, particularly males, move their left eye more variably. This variability is interpretable within our own hemisphere-based analysis of eye-movements in reading.We have also demonstrated precise coordination between the two eyes in the first published eye-tracking of an individual with Duane's Syndrome, in which the left eye is inhibited from moving to the left of the middle of the page.
Exploitation Route We are continuing to work on the statistical analysis of the full dataset, which will allow us to test various hypotheses about the dyslexics' reading behaviours.
Sectors Education
 
Description We have continued to work on the corpus of eye-movements, using it to inform our own theorising about the reading capacities of dyslexics. The database is complex and is closely tied to the computational and methodological infrastructure in which the data were acquired, together with theoretical assumptions concerning the binocular reading of multiline text. These considerations have meant that we have restricted the analysis of the database to our own group.
First Year Of Impact 2010
Sector Other
 
Title Edinburgh Binocular Eye-Movements in Dyslexia Database 
Description The database is a record of the movements of both the left and the right eyes of some 63 self-selecting dyslexic university students, together with a range of behaviours on cognitive tasks, plus demographic data. The participants read some 5000 words of journalistic text (representing the English component of the Edinburgh 5-Language Corpus of Eye-Movements in Reading). 
Type Of Material Database/Collection of data 
Provided To Others? No  
Impact We have gained insight into characteristic differences between dyslexics and typical readers that occur within individual fixations. We have also fortuitously tested a self-selecting dyslexic who presented with Duane's Syndrome, a genetic condition affecting the movement of (typically) the left eye. This subject's pattern of eye-movements has been analysed with respect to the coordination of the two eyes, revealing normal binocular coordination of the two eyes during reading of the right half of a line of text, and still-coordinated but widely disparate fixations during the reading of the left half of a line of text, during which time the right eye's input must be dominant.