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Lookup NU author(s): Dr Debbie Riby
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The comparison of cognitive and linguistic skills in individuals with developmental disorders is fraught with methodological and psychometric difficulties. In this paper, we illustrate some of these issues by comparing the receptive vocabulary knowledge and non‐verbal reasoning abilities of 41 children with Williams syndrome, a genetic disorder in which language abilities are often claimed to be relatively strong. Data from this group were compared with data from typically developing children, children with Down syndrome, and children with non‐specific learning difficulties using a number of approaches including comparison of age‐equivalent scores, matching, analysis of covariance, and regression‐based standardization. Across these analyses children with Williams syndrome consistently demonstrated relatively good receptive vocabulary knowledge, although this effect appeared strongest in the oldest children.
Author(s): Brock J, Jarrold C, Farran EK, Laws G, Riby DM
Publication type: Article
Publication status: Published
Journal: Clinical Linguistics & Phonetics
Year: 2007
Volume: 21
Issue: 9
Pages: 673-688
ISSN (print): 0269-9206
ISSN (electronic): 1464-5076
Publisher: Informa Healthcare
URL: http://dx.doi.org/10.1080/02699200701541433
DOI: 10.1080/02699200701541433
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