Verbal fluency, semantics, context and symptom complexes in schizophrenia

Vogel, Adam P., Chenery, Helen J., Dart, Catriona M., Doan, Binh, Tan, Mildred and Copland, David A. (2009) Verbal fluency, semantics, context and symptom complexes in schizophrenia. Journal of Psycholinguistic Research, 38 5: 459-473. doi:10.1007/s10936-009-9100-z

Author Vogel, Adam P.
Chenery, Helen J.
Dart, Catriona M.
Doan, Binh
Tan, Mildred
Copland, David A.
Title Verbal fluency, semantics, context and symptom complexes in schizophrenia
Journal name Journal of Psycholinguistic Research   Check publisher's open access policy
ISSN 0090-6905
Publication date 2009-10
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s10936-009-9100-z
Volume 38
Issue 5
Start page 459
End page 473
Total pages 15
Editor Robert W Rieber
Place of publication New York, NY, U.S.A.
Publisher Springer New York LLC
Collection year 2010
Language eng
Subject C1
170101 Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
170204 Linguistic Processes (incl. Speech Production and Comprehension)
Abstract Lexical-semantic access and retrieval was examined in 15 adults diagnosed with schizophrenia and matched controls. This study extends the literature through the inclusion of multiple examinations of lexical-semantic production within the same patient group and through correlating performance on these tasks with various positive and negative clinical symptoms. On tasks of verbal fluency, meaning generation, sentence production using contextual information and confrontation naming, participants with schizophrenia made significantly more semantic errors on naming tasks; produced fewer meanings for homophones; produced fewer items on semantic, phonological, cued and switching fluency tasks; and produced more errors on sentence production tasks when compared to healthy controls. Significant correlations were also observed between ratings of psychomotor poverty and measures of semantic production and mental inflexibility. This study has provided additional evidence for deficits in lexical-semantic retrieval which are not due to underlying semantic store degradation, do not involve phonological based retrieval, and at the level of sentence generation appear to vary as a function of the contextual constraints provided.
Keyword Thought disorder
Psychomotor poverty
Q-Index Code C1
Q-Index Status Confirmed Code

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Created: Thu, 12 Nov 2009, 12:01:16 EST by Mr Andrew Martlew on behalf of School of Health & Rehabilitation Sciences