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Action versus animal naming fluency in subcortical dementia, frontal dementias, and Alzheimer's disease
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In: NEUROCASE , 16 (3) 259 - 266. (2010) (2010)
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The neural substrate of naming events: Effects of processing demands but not of grammatical class
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In: CEREB CORTEX , 18 (1) 171 - 177. (2008) (2008)
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Re-visiting "semantic facilitation" of word retrieval for people with aphasia: Facilitation yes but semantic no
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In: CORTEX , 42 (6) 946 - 962. (2006) (2006)
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Abstract:
Previous research has shown that word-to-picture matching for targets that cannot be named at pre-test results in improved naming relative to untreated control items for people with aphasia. This paper replicates and extends this finding and investigates its source. Is the effect a result of priming of semantic representations, or of post-semantic mechanisms in word retrieval?The first experiment shows that word-to-picture matching with unrelated distractors improves naming at short (2-3 minutes) and long (up to 25 minute) lags. There was no effect of being made aware of the relationship between word-to-picture matching and picture naming. People who have a semantic impairment improve only with a short lag between word-to-picture matching and naming. Participants with less semantic impairment show larger priming effects that are equal at short and long lags between word-to-picture matching and naming.The second experiment shows that the facilitation effect is just as large for word-to-picture matching with unrelated distractors as with semantically-related distractors. Furthermore, overall there was no difference between matching with coordinate items and with associated items.The results of these experiments show that facilitation of naming by word-to-picture matching in people with aphasia cannot be a result of the priming of semantic representations. Instead they are consistent with two effects: word-to-picture matching results in priming at a lemma level for aphasic people with a semantic impairment that is only found with a short lag between word-to-picture matching and naming. Word-to-picture matching causes priming of the lemma to output lexicon entry mapping that benefits participants with less semantic impairment that is evident at both a short and long lag between word-to-picture matching and naming. These findings fit well with previous research on repetition priming of naming with normal subjects.
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Keyword:
anomia; aphasia; ERRORS; facilitation; LANGUAGE PRODUCTION; LEXICAL ACCESS; LOCUS; naming; OBJECT; PARALEXIA; priming; REPETITION; semantic therapy; TIME; word retrieval
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URL: http://discovery.ucl.ac.uk/10275/
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Semantic similarity and grammatical class in naming actions
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In: COGNITION , 94 (3) B91 - B100. (2005) (2005)
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