Original Paper

Journal of Autism and Developmental Disorders

, Volume 38, Issue 7, pp 1201-1210

Comparison of Form and Motion Coherence Processing in Autistic Spectrum Disorders and Dyslexia

  • Stella TsermentseliAffiliated withCentre for Cognition and Neuroimaging, Brunel University Email author 
  • , Justin M. O’BrienAffiliated withCentre for Cognition and Neuroimaging, Brunel UniversityCentre for Research in Infant Behaviour, Institute of Psychology, Brunel University
  • , Janine V. SpencerAffiliated withCentre for Cognition and Neuroimaging, Brunel UniversityCentre for Research in Infant Behaviour, Institute of Psychology, Brunel University

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Abstract

A large body of research has reported visual perception deficits in both people with dyslexia and autistic spectrum disorders. In this study, we compared form and motion coherence detection between a group of adults with high-functioning autism, a group with Asperger’s disorder, a group with dyslexia, and a matched control group. It was found that motion detection was intact in dyslexia and Asperger. Individuals with high-functioning autism showed a general impaired ability to detect coherent form and motion. Participants with Asperger’s syndrome showed lower form coherence thresholds than the dyslexic and normally developing adults. The results are discussed with respect to the involvement of the dorsal and ventral pathways in developmental disorders.

Keywords

High-functioning autism Asperger’s disorder Dyslexia Visual system Motion processing Form processing