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Perceptual grouping ability in Williams syndrome: evidence for deviant patterns of performance

Farran, EK; (2005) Perceptual grouping ability in Williams syndrome: evidence for deviant patterns of performance. Neuropsychologia , 43 (5) pp. 815-822. 10.1016/j.neuropsychologia.2004.09.001. Green open access

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Abstract

Williams syndrome (WS) is a rare genetic disorder. At a cognitive level, this population display poor visuo-spatial cognition when compared to verbal ability. Within the visuo-spatial domain, it is now accepted that individuals with WS are able to perceive both local and global aspects of an image, albeit at a low level. The present study examines the manner in which local elements are grouped into a global whole in WS. Fifteen individuals with WS and 15 typically developing controls, matched for non-verbal ability, were presented with a matrix of local elements and asked whether these elements were perceptually grouped horizontally or vertically. The WS group was at the same level as the control group when grouping by luminance, closure, and alignment. However, their ability to group by shape, orientation and proximity was significantly poorer than controls. This unusual profile of grouping abilities in WS suggests that these individuals do not form a global percept in a typical manner.

Type: Article
Title: Perceptual grouping ability in Williams syndrome: evidence for deviant patterns of performance
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuropsychologia.2004.09.001
Publisher version: http://dx.doi.org/10.1016/j.neuropsychologia.2004....
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Aptitude, Child, Discrimination Learning, Humans, Neuropsychological Tests, Orientation, Perception, Psychomotor Performance, Williams Syndrome
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education
URI: https://discovery.ucl.ac.uk/id/eprint/1477854
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