Abstract
This study aimed to assess the visuospatial abilities of five children with Williams syndrome (four males aged 9 years 3 months, 7 years 11 months, 8 years 1 month, and 10 years 8 months respectively, and one female aged 6 years 3 months). First, the children's visuospatial abilities were examined by asking them to copy a figure. Second, their cognitive processing abilities were assessed using the Japanese Kaufman Assessment Battery for Children. This test was used because it is an objective one, standardized in Japan, and is a measure of fluid ability including spatial localization. Participants scored significantly low on the spatial memory subtest indicating that there was a deficit in spatial localization. Children's performance in line copying tasks improved when the dots were in colour. Results suggest a deficit in the dorsal stream of visual cognition, with a relatively preserved ventral stream.
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