Motion processing specialization in Williams syndrome

被引:51
作者
Reiss, JE [1 ]
Hoffman, JE
Landau, B
机构
[1] Univ Delaware, Dept Psychol, Newark, DE 19716 USA
[2] Johns Hopkins Univ, Dept Cognit Sci, Baltimore, MD 21218 USA
基金
美国国家科学基金会;
关键词
Williams syndrome; motion coherence; biological motion; form-from-motion; dorsal/ventral visual processing;
D O I
10.1016/j.visres.2005.05.011
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Williams syndrome (WS) is a rare genetic disorder characterized by severe spatial deficits and relatively spared language. Although initial research Suggested that WS entails a generalized motion processing deficit, later work demonstrated intact biological motion perception in people with WS, reflecting a sparing of a specific motion perception system. The present study examined whether this sparing is unique to biological motion, or extends to other motion tasks as well, WS children and adults and normal controls were tested to examine developmental changes across it variety of motion tasks. Results indicated that WS individuals performed at normal levels for motion coherence and biological motion tasks bill had elevated thresholds for the 2-D form-from-motion task, a profile that extended into adulthood. These findings provide evidence that a genetic impairment can lead to a selective motion processing deficit and argue against characterizing WS as including a general motion processing impairment. The nature of the motion deficit is considered, including the implications for WS dorsal/ventral processing. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3379 / 3390
页数:12
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