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學術研究

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TitleSemantic Categorization in Prader-Willi Syndrome: A Case Study in Chinese
作者Li-chi Elvis Yang and Shiao-hui Chan
作者說明National Taiwan Normal University
Abstract

Prader-Willi Syndrome (PWS), a multiple genetic anomaly disorder, is mainly associated with mild to moderate mental retardation. The purpose of the present study was to investigate the intactness of a PWS patient’s (AH) conceptual structure through “taxonomical  hierarchy”  and  “prototypicality”,  two  vital  dimensions  capturing  the external  and  internal  structure  of  semantic  categorization.  Two  experiments  with linguistic and non-linguistic conceptual tasks revealed that the patient’s performance was much poorer than that of the mental age-matched normal controls. Further corroborated by follow-up qualitative interviews, AH’s incompleteness in her taxonomical hierarchy and deficiencies in the semantic representations were demonstrated in some exemplars under certain categories. However, prototypicality in AH was manifest to a certain degree in categories of which AH had better knowledge. Other linguistic impairment not directly related to hierarchy and prototypicality was also observed, evidencing the incompleteness of her conceptual knowledge as opposed to that of normal controls.

Key words: Prader-Willi Syndrome (PWS), semantic categorization, taxonomical hierarchy, prototypicality effects, Chinese

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