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  • Title: Asynchrony in the cognitive and lexical development of young children with Williams syndrome.
    Author: Nazzi T, Gopnik A, Karmiloff-Smith A.
    Journal: J Child Lang; 2005 May; 32(2):427-38. PubMed ID: 16045258.
    Abstract:
    The present study investigates whether five-to-six-year-old children with Williams syndrome (N = 8) can form new object categories based on naming information alone, and compares them with five groups of typically developing children aged 2;0 to 6;0 (N = 34 children). Children were presented with triads of dissimilar objects; all objects in a triad were labelled, two of them with the same pseudoname. Name-based categorization was evaluated through object selection. Performance was above chance level for all groups. Performance reached a ceiling at about 4;0 for the typically developing children. For the children with Williams Syndrome, performance remained below chronological age level. The present results are discussed in light of previous findings of a failure to perform name-based categorization in younger children with Williams syndrome and the persistent asynchrony between cognitive and lexical development in this disorder.
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