Linguistic heterogeneity in Williams syndrome
Stojanovik, V., Perkins, M. and Howard, S. (2006) Linguistic heterogeneity in Williams syndrome. Clinical Linguistics & Phonetics, 20 (7-8). pp. 547-552. ISSN 0269-9206
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To link to this article DOI: 10.1080/02699200500266422
Williams syndrome (WS) is a rare genetic disorder resulting from a deletion on chromosome 7. A number of studies have shown that individuals with WS have a superior linguistic profile compared to their non-verbal abilities, however the evidence has been inconclusive, as many studies have disputed such a profile. The vast majority of studies on WS have assumed a single, homogeneous WS linguistic profile in order to support various theoretical viewpoints. The present study investigated the linguistic profiles of 5 individuals with WS on a number of standardized verbal measures and in conversational settings. The results indicated substantially variable performance in all aspects of the verbal domain, which supports the view that WS, linguistically, is a rather heterogeneous condition and this should be taken into consideration when referring to it in theoretical accounts of language acquisition and debates on modularity.