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    Past tense formation in Williams Syndrome

    Thomas, Michael and Grant, J. and Barham, Z. and Gsodl, M. and Laing, E. and Lakusta, L. and Tyler, L.K. and Grice, S. and Paterson, S. and Karmiloff-Smith, Annette (2001) Past tense formation in Williams Syndrome. Language and Cognitive Processes 16 (2/3), pp. 143-176. ISSN 0169-0965.

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    It has been claimed that in the language systems of people with Williams syndrome (WS), syntax is intact but lexical memory is impaired. Evidence has come from past tense elicitation tasks with a small number of participants where individuals with WS are said to have a specific deficit in forming irregular past tenses. However, typically developing children also show poorer performance on irregulars than regulars in these tasks, and one of the central features of WS language development is that it is delayed. We compared the performance of 21 participants with WS on two past tense elicitation tasks with that of four typically developing control groups, at ages 6, 8, 10, and adult. When verbal mental age was controlled for, participants in the WS group displayed no selective deficit in irregular past tense performance. However, there was evidence for lower levels of generalisation to novel strings. This is consistent with the hypothesis that the WS language system is delayed because it has developed under different constraints, constraints that perhaps include atypical phonological representations. The results are discussed in relation to dual-mechanism and connectionist computational models of language development, and to the possible differential weight given to phonology versus semantics in WS development.


    Item Type: Article
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 06 Apr 2020 12:43
    Last Modified: 08 Aug 2023 08:18


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