Semantic feature knowledge and picture naming in dementia of Alzheimer's type: A new approach

Peter Garrard, Matthew A. Lambon Ralph, Karalyn Patterson, Katherine H. Pratt, John R. Hodges

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    Abstract

    This study addresses continuing controversies concerning the nature of semantic impairment in early dementia of the Alzheimer type (DAT), and the relationship between conceptual knowledge and picture naming. A series of analyses of fine-grained feature knowledge data show that: (1) distinctive features of concepts were more vulnerable than shared; (2) the amount of attribute knowledge about a concept was associated reliably, and in a graded fashion, with the ability to name a picture of that item; (3) sensory features were differentially important in naming; and (4) the degree of disruption to different types of attribute knowledge did not vary between items from living and nonliving domains. These findings are discussed in the context of contemporary cognitive and computational models of semantic memory organisation. © 2004 Elsevier Inc. All rights reserved.
    Original languageEnglish
    Pages (from-to)79-94
    Number of pages15
    JournalBrain and Language
    Volume93
    Issue number1
    DOIs
    Publication statusPublished - Apr 2005

    Keywords

    • Alzheimer's disease
    • Naming
    • Semantic features
    • Semantic memory

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