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Variability and standardized test profiles in typically developing children and children with Williams Syndrome
Author(s) -
Van Herwegen Jo,
Rundblad Gabriella,
Davelaar Eddy J.,
Annaz Dagmara
Publication year - 2011
Publication title -
british journal of developmental psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.062
H-Index - 75
eISSN - 2044-835X
pISSN - 0261-510X
DOI - 10.1111/j.2044-835x.2010.02015.x
Subject(s) - psychology , cognition , developmental psychology , memory span , effects of sleep deprivation on cognitive performance , cognitive test , typically developing , standardized test , mental age , working memory , autism , psychiatry , mathematics education
Williams Syndrome (WS) is a developmental disorder, which due to its specific cognitive profile, has been of interest to multidisciplinary research in order to study the pathways between cognition, brain, and genes. Previous studies investigating individual performance on cognitive tasks have reported large variability within the WS cognitive profile, which has encouraged the investigation of WS subgroups. The current study compared the variability in performance scores on five verbal and non‐verbal standardized tests in 33 children with WS and in 33 typically developing (TD) children of a similar chronological age (CA). In contrast to previous studies, the current study did not find significant differences in variability in performance on British Picture Vocabulary scale, Test Reception of Grammar and Digit span Forward between WS and TD groups when CA was controlled for. However, there was significantly less variability in younger WS participants for performance scores on Pattern Construction compared to the TD group. In light of these results, methodological issues and the importance of taking CA into account in analyses will be discussed.