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Article: Impairment to phonological processes in a Cantonese-speaking brain-damaged patient

TitleImpairment to phonological processes in a Cantonese-speaking brain-damaged patient
Authors
Issue Date2004
PublisherPsychology Press. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/02687038.asp
Citation
Aphasiology, 2004, v. 18 n. 4, p. 373-388 How to Cite?
AbstractBackground: Previous studies have shown that brain-damaged patients with selective deficits to phonological processes produced frequent phonological errors and similar error patterns in all spoken tasks, exhibited the effects of word frequency, grammatical class, and imageability, and were unable to make rhyming judgements, due to impaired lexical retrieval and/or phonological representations. Aims: This paper describes a Cantonese-speaking brain-damaged patient, LKK, whose performance patterns in spoken tasks indicate impairment to both the lexically mediated nonsemantic and semantic pathways of oral production, as well as the phonological output buffer. Methods & Procedures: A range of tasks was conducted including repetition, reading aloud, oral naming, written/spoken word-picture matching, non-verbal semantic tests, written lexical decision, and homophone judgements. Outcomes & Results: LKK performed normally on written lexical decision, word-picture matching, and non-verbal semantic tests, but he was unable to make homophone judgements and showed impaired production in all oral tasks. He was better able to read aloud names of objects than to name them. He also made more semantic errors in naming than reading. His accuracy in reading single words was affected by word frequency and form class. Further observations of his oral production included better (but nevertheless impaired) performance on repetition than reading and naming, a consistent effect of word length across tasks, and a tendency for phonological errors to occur on the coda compared with the onset. Conclusions: There was sufficient evidence for deficits of the phonological lexicon and/or the access to it along the non-semantic route and the semantic pathway at the post-semantic level in LKK. The effect of word length and comparable patterns of error distribution across spoken tasks suggested additional impairment to the phonological output buffer. The different levels of accuracy in repetition, reading, and naming, as well as the differential rates of semantic errors in these tasks were consistent with predictions of the summation hypothesis. © 2004 Psychology Press Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/85417
ISSN
2015 Impact Factor: 1.139
2015 SCImago Journal Rankings: 0.730
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLaw, SPen_HK
dc.date.accessioned2010-09-06T09:04:27Z-
dc.date.available2010-09-06T09:04:27Z-
dc.date.issued2004en_HK
dc.identifier.citationAphasiology, 2004, v. 18 n. 4, p. 373-388en_HK
dc.identifier.issn0268-7038en_HK
dc.identifier.urihttp://hdl.handle.net/10722/85417-
dc.description.abstractBackground: Previous studies have shown that brain-damaged patients with selective deficits to phonological processes produced frequent phonological errors and similar error patterns in all spoken tasks, exhibited the effects of word frequency, grammatical class, and imageability, and were unable to make rhyming judgements, due to impaired lexical retrieval and/or phonological representations. Aims: This paper describes a Cantonese-speaking brain-damaged patient, LKK, whose performance patterns in spoken tasks indicate impairment to both the lexically mediated nonsemantic and semantic pathways of oral production, as well as the phonological output buffer. Methods & Procedures: A range of tasks was conducted including repetition, reading aloud, oral naming, written/spoken word-picture matching, non-verbal semantic tests, written lexical decision, and homophone judgements. Outcomes & Results: LKK performed normally on written lexical decision, word-picture matching, and non-verbal semantic tests, but he was unable to make homophone judgements and showed impaired production in all oral tasks. He was better able to read aloud names of objects than to name them. He also made more semantic errors in naming than reading. His accuracy in reading single words was affected by word frequency and form class. Further observations of his oral production included better (but nevertheless impaired) performance on repetition than reading and naming, a consistent effect of word length across tasks, and a tendency for phonological errors to occur on the coda compared with the onset. Conclusions: There was sufficient evidence for deficits of the phonological lexicon and/or the access to it along the non-semantic route and the semantic pathway at the post-semantic level in LKK. The effect of word length and comparable patterns of error distribution across spoken tasks suggested additional impairment to the phonological output buffer. The different levels of accuracy in repetition, reading, and naming, as well as the differential rates of semantic errors in these tasks were consistent with predictions of the summation hypothesis. © 2004 Psychology Press Ltd.en_HK
dc.languageengen_HK
dc.publisherPsychology Press. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/02687038.aspen_HK
dc.relation.ispartofAphasiologyen_HK
dc.rightsAphasiology. Copyright © Psychology Press.en_HK
dc.titleImpairment to phonological processes in a Cantonese-speaking brain-damaged patienten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0268-7038&volume=18&issue=4&spage=373&epage=388&date=2004&atitle=Impairment+to+Phonological+Processes+in+a+Cantonese-speaking+Brain-damaged+Patienten_HK
dc.identifier.emailLaw, SP: splaw@hku.hken_HK
dc.identifier.authorityLaw, SP=rp00920en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/02687030344000544en_HK
dc.identifier.scopuseid_2-s2.0-2442476018en_HK
dc.identifier.hkuros89711en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-2442476018&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume18en_HK
dc.identifier.issue4en_HK
dc.identifier.spage373en_HK
dc.identifier.epage388en_HK
dc.identifier.isiWOS:000220960000005-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLaw, SP=7202242088en_HK

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