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ERIC Number: EJ772964
Record Type: Journal
Publication Date: 2007-Sep
Pages: 16
Abstractor: Author
Reference Count: 56
ISSN: ISSN-0269-9206
Do Children with Williams Syndrome Really Have Good Vocabulary Knowledge? Methods for Comparing Cognitive and Linguistic Abilities in Developmental Disorders
Brock, Jon; Jarrold, Christopher; Farran, Emily K.; Laws, Glynis; Riby, Deborah M.
Clinical Linguistics & Phonetics, v21 n9 p673-688 Sep 2007
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. (Contains 3 tables, 6 figures and 1 note.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Raven Progressive Matrices