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Vision Res. 2007 Sep;47(19):2521-30. Epub 2007 Aug 23.

The eye movements of dyslexic children during reading and visual search: impact of the visual attention span.

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Laboratoire de Psychologie et Neuro-Cognition (UMR5105 CNRS), Université Pierre Mendès France, 1251 Avenue Centrale BP 47, 38040 Grenoble Cedex 9, France.


The eye movements of 14 French dyslexic children having a VA span reduction and 14 normal readers were compared in two tasks of visual search and text reading. The dyslexic participants made a higher number of rightward fixations in reading only. They simultaneously processed the same low number of letters in both tasks whereas normal readers processed far more letters in reading. Importantly, the children's VA span abilities related to the number of letters simultaneously processed in reading. The atypical eye movements of some dyslexic readers in reading thus appear to reflect difficulties to increase their VA span according to the task request.

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