Document Detail

Evaluation of speech misattribution bias in schizophrenia.
MedLine Citation:
PMID:  19719896     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The attribution of self-generated speech to others could explain the experience of verbal hallucinations. To test this hypothesis, we developed a task to simultaneously evaluate (A) operations of self-other distinction and (B) operations that have the same cognitive demands as in A apart from self-other distinction. By adjusting A to B, operations of self-other distinction were specifically evaluated. METHOD: Thirty-nine schizophrenia patients and 26 matched healthy controls were required to distinguish between self-generated, other-generated and non-generated (self or other) sentences. The sentences were in the first, second or third person and were read in a male or female voice in equal proportions. Mixed multi-level logistic regression models were used to investigate the effect of group, sentence source, pronoun and gender of the heard sentences on response accuracy. RESULTS: Patients differed from controls in the recognition of self-generated and other-generated sentences but not in general recognition ability. Pronoun was a significant predictor of response accuracy but without any significant interaction with group. Differences in the gender of heard sentences were not significant. Misattribution bias differentiated groups only in the self-other direction. CONCLUSIONS: These data support the theory that misattribution of self-generated speech to others could result in verbal hallucinations. The syntactic (pronoun) factor could impact self-other distinction in subtypes of verbal hallucinations that are phenomenologically defined whereas the acoustic factor (gender of heard speech) is unlikely to affect self-other distinction.
M Stephane; M Kuskowski; K McClannahan; C Surerus; K Nelson
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Publication Detail:
Type:  Journal Article     Date:  2009-09-01
Journal Detail:
Title:  Psychological medicine     Volume:  40     ISSN:  1469-8978     ISO Abbreviation:  Psychol Med     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-03-29     Completed Date:  2010-06-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1254142     Medline TA:  Psychol Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  741-8     Citation Subset:  IM    
Psychiatry Service line, VA Medical Center, Minneapolis, MN 55417, USA.
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MeSH Terms
Hallucinations / diagnosis*,  psychology*
Middle Aged
Psychiatric Status Rating Scales / statistics & numerical data
Psychotic Disorders / diagnosis*,  psychology*
Recognition (Psychology)
Schizophrenia / diagnosis*
Schizophrenic Language*
Schizophrenic Psychology*
Speech Acoustics
Speech Perception*
Verbal Behavior

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

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