Colour discrimination and categorisation in Williams syndrome

Farran, Emily K, Cranwell, Matthew B, Alvarez, James and Franklin, Anna (2013) Colour discrimination and categorisation in Williams syndrome. Research in Developmental Disabilities, 34 (10). pp. 3352-3360. ISSN 0891-4222

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Individuals with Williams syndrome (WS) present with impaired functioning of the dorsal visual stream relative to the ventral visual stream. As such, little attention has been given to ventral stream functions in WS. We investigated colour processing, a predominantly ventral stream function, for the first time in nineteen individuals with Williams syndrome. Colour discrimination was assessed using the Farnsworth-Munsell 100 hue test. Colour categorisation was assessed using a match-to-sample test and a colour naming task. A visual search task was also included as a measure of sensitivity to the size of perceptual colour difference. Results showed that individuals with WS have reduced colour discrimination relative to typically developing participants matched for chronological age; performance was commensurate with a typically developing group matched for non-verbal ability. In contrast, categorisation was typical in WS, although there was some evidence that sensitivity to the size of perceptual colour differences was reduced in this group.

Item Type: Article
Schools and Departments: School of Psychology > Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Depositing User: Anna Franklin
Date Deposited: 18 Jun 2014 09:11
Last Modified: 18 Jun 2014 09:11
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