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Exploring block construction and mental imagery: Evidence of atypical orientation discrimination in Williams syndrome

Farran, Emily and Jarrold, C (2004) Exploring block construction and mental imagery: Evidence of atypical orientation discrimination in Williams syndrome. Visual Cognition, 11 (8). pp. 1019-1040. ISSN 1350-6285

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Abstract

The visuo-spatial perceptual abilities of individuals with Williams syndrome (WS) were investigated in two experiments. Experiment 1 measured the ability of participants to discriminate between oblique and between nonoblique orientations. Individuals with WS showed a smaller effect of obliqueness in response time, when compared to controls matched for non-verbal mental age. Experiment 2 investigated the possibility that this deviant pattern of orientation discrimination accounts for the poor ability to perform mental rotation in WS (Farran et al., 2001). A size transformation task was employed, which shares the image transformation requirements of mental rotation, but not the orientation discrimination demands. Individuals with WS performed at the same level as controls. The results suggest a deviance at the perceptual level in WS, in processing orientation, which fractionates from the ability to mentally transform images.

Item Type: Article
Additional Information: This is an electronic version of an article published in arran, Emily and Jarrold, C. (2004) Exploring block construction and mental imagery: Evidence of atypical orientation discrimination in Williams syndrome. Visual Cognition, 11 (8). pp. 1019-1040. Visual Cognition is available online at: http://www.informaworld.com/10.1080/13506280444000058
Divisions: IOE Departments > Departments > Psychology and Human Development
Depositing User: IOE Repository Editor (2)
Date Deposited: 19 Mar 2010 14:51
Last Modified: 14 Oct 2013 12:06
URI: http://eprints.ioe.ac.uk/id/eprint/2061

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