Compound Naming in Aphasic Speakers: The effect of activation parameters on decomposition and phonetic errors
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2000
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Swarthmore College. Dept. of Linguistics
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Thesis (B.A.)
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Full copyright to this work is retained by the student author. It may only be used for non-commercial, research, and educational purposes. All other uses are restricted.
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Abstract
A long-standing question in lexical processing is whether compounds decompose into
separate morphemes. Seven aphasic patients were tested with a picture naming test to see if
compounds decompose into morphemes in the lexicon. Certain patients were found to produce
more decomposition errors as well as more phonetic errors then is found in the error pattern of
normal speakers. These data are accounted for within a new version of an interactive activation
(IA) model (Dell, 1986) that incorporates decomposition of compound morphemes. This model
accounts for both normal and aphasic type errors. In this model, decomposition and phonetic
errors occur more often when lexical activation parameters (connection strength and decay rate) are
altered.