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Effect of comorbid developmental dyslexia on oculomotor behavior in children with developmental coordination disorder: A study with the Developmental Eye Movement test

Abstract : Studies have suggested a dysfunction in oculomotor skills in children with developmental coordination disorder (DCD). It has been proposed that the Developmental Eye Movement (DEM) test is useful in testing the dyslexics' (DD) oculomotor behavior during reading, in a simple and indirect manner. The present study aimed at exploring the oculomotor behavior in children with DCD as assessed with the DEM test. Furthermore, we compared children with DCD to children with DD and to children with both DCD and DD in order to investigate the specificity of the oculomotor difficulties, as measured by the DEM test. Results showed that 1) children with DCD presented mild atypical performances at the DEM test (error z-score only), 2) children with DD presented particularly poor performance on the DEM test, and 3) the co-morbid condition (DCD+DD) did not add to the severity of atypical performance obtained on the DEM test. In sum, children with DCD were the less affected according to the DEM test, and children with DD (isolated or comorbid) presented the most atypical performance. Results at the DEM test did not allow making emerge clear oculomotor atypicalities in DCD. We thus conclude that more research using eye-tracking techniques is needed to explore the nature of oculomotor atypicalities in DCD children, to distinguish DD and DCD oculomotor behavior, and to understand the profile of children with dual diagnosis.
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Submitted on : Tuesday, January 4, 2022 - 3:31:41 PM
Last modification on : Monday, February 7, 2022 - 2:49:23 PM

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Stéphanie Bellocchi, Stéphanie Ducrot, Jessica Tallet, Mélanie Jucla, Marianne Jover. Effect of comorbid developmental dyslexia on oculomotor behavior in children with developmental coordination disorder: A study with the Developmental Eye Movement test. Human Movement Science, Elsevier, 2021, 76, pp.102764. ⟨10.1016/j.humov.2021.102764⟩. ⟨hal-03366871⟩

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