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Orientation Perception in Williams Syndrome: Discrimination and Integration
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Palomares, Melanie; Landau, Barbara; Egeth, Howard – Brain and Cognition, 2009
Williams Syndrome (WS) is a rare neurodevelopmental disorder, which stems from a genetic deletion on chromosome 7 and causes a profound weakness in visuospatial cognition. Our current study explores how orientation perception may contribute to the visuospatial deficits in WS. In Experiment 1, we found that WS individuals and normal 3-4 year olds…
Descriptors: Developmental Disabilities, Neurological Impairments, Spatial Ability, Young Children
Brief Report: Eye Movements during Visual Search Tasks Indicate Enhanced Stimulus Discriminability in Subjects with PDD
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Kemner, Chantal; van Ewijk, Lizet; van Engeland, Herman; Hooge, Ignace – Journal of Autism and Developmental Disorders, 2008
Subjects with PDD excel on certain visuo-spatial tasks, amongst which visual search tasks, and this has been attributed to enhanced perceptual discrimination. However, an alternative explanation is that subjects with PDD show a different, more effective search strategy. The present study aimed to test both hypotheses, by measuring eye movements…
Descriptors: Control Groups, Eye Movements, Hypothesis Testing, Human Body
Children's Construction of Horizontals, Verticals, and Diagonals: An Operational Explanation of the "Oblique Effect."
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Frye, Douglas; And Others – Developmental Psychology, 1986
Investigates the problem young children have in constructing diagonals, noting that, on the whole, they can not make diagonals in the horizontal/vertical configuration. (HOD)
Descriptors: Adults, Age Differences, Children, Difficulty Level