| Externalizing and personalizing biases in persecutory delusions: the relationship with poor insight and theory-of-mind. | |
MedLine Citation:
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PMID: 16038873 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The presence of externalizing bias (EB) for negative events together with personalizing bias (PB) (a bias to blame others rather than circumstances) may jointly constitute a vulnerability to develop persecutory delusions (PDs). Whereas EB purportedly serves to defend a vulnerable self-concept by avoiding negative self-attributions and might therefore exacerbate poor insight, PB may reflect cognitive deficits, including theory-of-mind impairment. We investigated these proposals in 34 schizophrenic patients with a history of PDs and 21 healthy controls. Patients with moderate- to severe-PDs and patients without a current PD showed excessive EB which was, surprisingly, absent in patients with mild persecutory delusions (mild-PDs). That EB might wax and wane with fluctuating delusional intensity was interpreted in accord with a new dynamic model of attribution self-representation cycles. As predicted, EB exacerbated poor insight. However, counter to predictions, theory-of-mind impairment did not increase PB, which was marked in all participants, whether clinical or non-clinical; instead, theory-of-mind impairment was also correlated with poor insight. Our findings indicate multiple pathways to poor insight, one of which is a theory-of-mind difficulty, impairing the capacity to simulate other perspectives for the purpose of critically evaluating one's own beliefs and circumstances. |
Authors:
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Robyn Langdon; Tonia Corner; Jen McLaren; Philip B Ward; Max Coltheart |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-07-21 |
Journal Detail:
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Title: Behaviour research and therapy Volume: 44 ISSN: 0005-7967 ISO Abbreviation: Behav Res Ther Publication Date: 2006 May |
Date Detail:
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Created Date: 2006-03-20 Completed Date: 2007-01-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372477 Medline TA: Behav Res Ther Country: England |
Other Details:
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Languages: eng Pagination: 699-713 Citation Subset: IM |
Affiliation:
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Macquarie Centre for Cognitive Science, Macquarie University, Sydney, Australia. robyn@maccs.mq.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Delusions / psychology* Female Humans Internal-External Control* Male Middle Aged Paranoid Disorders / psychology Psychological Theory Schizophrenic Psychology* Self Concept |
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