Document Detail

Negative features, retrieval processes and verbal fluency in schizophrenia.
MedLine Citation:
PMID:  8306119     Owner:  NLM     Status:  MEDLINE    
Twenty chronic schizophrenic patients, ten matched normal controls and nine depressed controls performed categorical verbal fluency tasks for three minutes each on five separate occasions. On each occasion the schizophrenic patients generated significantly fewer words than the controls. Comparison of the different occasions showed that the schizophrenic patients had as many words available in their inner lexicons but were inefficient in retrieving them. The schizophrenic patients also generated fewer clusters of related words and more words outside the specified category. Reduced ability to generate words while the lexicon remained intact was more marked in patients with negative features. Patients with incoherence, in contrast, were more likely to produce inappropriate words. We propose that both poverty of speech and incoherence of speech reflect problems in the retrieval of words from the lexicon. To cope with these problems patients with poverty of speech terminate their search prematurely while the patients with incoherence commit errors in selecting words for output.
H A Allen; P F Liddle; C D Frith
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The British journal of psychiatry : the journal of mental science     Volume:  163     ISSN:  0007-1250     ISO Abbreviation:  Br J Psychiatry     Publication Date:  1993 Dec 
Date Detail:
Created Date:  1994-03-15     Completed Date:  1994-03-15     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0342367     Medline TA:  Br J Psychiatry     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  769-75     Citation Subset:  IM    
Psychology Department, Northwick Park Hospital, Harrow, Middlesex.
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MeSH Terms
Affective Symptoms / diagnosis,  psychology
Chronic Disease
Mental Recall*
Middle Aged
Psychiatric Status Rating Scales*
Schizophrenia / diagnosis*
Schizophrenic Language*
Schizophrenic Psychology*
Speech Production Measurement*
Verbal Behavior*
Comment In:
Br J Psychiatry. 1994 May;164(5):704   [PMID:  7921734 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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