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Distinctions between two phonological output deficits

Published online by Cambridge University Press:  28 November 2008

Susan E. Kohn*
Affiliation:
Boston University School of Medicine
Katherine L. Smith
Affiliation:
Boston University School of Medicine
*
Susan Kohn, Moss Rehabilitation Research Institute, 1200 West Tabor Road, Philadelphia, PA 19141

Abstract

Two aphasics with a similar level of phonological production difficulty are compared to distinguish the properties of disruption to two stages in the phonological system for producing single words: activation of stored lexical-phonological representations versus construction of phonemic representations. A set of distinguishing behavioral features for breakdown at each stage is generated on the basis of a model of single word production. Important variables for analyzing output include: (a) the unit of phonological encoding (morpheme versus syllable), (b) the phonemic relationship between targets and responses, (c) the effects of target consonant-vowel (CV) structure, and (d) the level of pseudoword production. On a set of production tests, the expected behavioral pattern for impaired lexical-phonological activation was displayed by LW, while the expected behavioral pattern for impaired phonemic planning was displayed by CM.

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Articles
Copyright
Copyright © Cambridge University Press 1994

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