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ERIC Number: EJ849903
Record Type: Journal
Publication Date: 2008-Jul
Pages: 13
Abstractor: As Provided
Reference Count: 48
ISSN: ISSN-1363-755X
Developmental Trajectories for Spatial Frames of Reference in Williams Syndrome
Nardini, Marko; Atkinson, Janette; Braddick, Oliver; Burgess, Neil
Developmental Science, v11 n4 p583-595 Jul 2008
Williams syndrome (WS) is a genetic disorder associated with severe visuocognitive impairment. Individuals with WS also report difficulties with everyday wayfinding. To study the development of body-, environment-, and object-based spatial frames of reference in WS, we tested 45 children and adults with WS on a search task in which the participant and a spatial array are moved with respect to each other. Although individuals with WS showed a marked delay, like young controls they demonstrated independent, additive use of body- and environment-based frames of reference. Crucially, object-based (intrinsic) representations based on local landmarks within the array were only marginally used even by adults with WS, whereas in typical development these emerge at 5 years. Deficits in landmark use are consistent with wayfinding difficulties in WS, and may also contribute to problems with basic localization, since in typical development landmark-based representations supplement those based on the body and on self-motion. Difficulties with inhibition or mental rotation may be further components in the impaired ability to use the correct reference frame in WS.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A