Diagnostic and correction of visual object recognition in preschool children with Autism spectrum disorders (ASD) D Pereverzeva |
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Center of Neurobiological Diagnosis of Hereditary Mental Disorders in Children and Adolescents, Moscow State University of Psychology and Education, Russian Federation
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| The aim of our study was to assess visual object recognition in ASD children with severe and middle learning disabilities (SLD / MLD). Twenty children with ASD (3,4 - 7 yrs), (experimental group); 10 children with Down syndrome (DS) (3,6-7 yrs), and 20 typically developing children (TD) (1,4 – 4 yrs) (control groups) were assessed with visual cognitive tests battery; Psycho-educational profile; Childhood autism rating scale. The groups were matched on psychomotor level of development. Results. 1. Participants from MLD ASD group made significantly more recognition errors than TD matches, relying on the similar geometrical shape of objects projections, and ignoring other perceptive and semantic features (p<0,001), and were significantly better in the identification of abstract figures. There was a positive correlation between the number of such shape-based errors and the depth of autistic symptoms. 2. The number of errors in the “geometrical shape matching” task in the SLD ASD group depended on the size of figures and was significantly higher in the “big size” trial (angular dimension of stimuli 100°) than in the “small size” trial (10°) (p=0,005). There was no difference between tests results in TD and DS groups. Using of yoked-prism lenses provoked improvement in shape recognition. |
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