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Related Experiment Videos

Paranoia, persecutory delusions and attributional biases.

Ryan McKay1, Robyn Langdon, Max Coltheart

  • 1Macquarie Centre for Cognitive Science, Macquarie University, Sydney, NSW, 2109, Australia. ryan@maccs.mq.edu.au

Psychiatry Research
|August 30, 2005
PubMed
Summary

Attributional biases are not linked to mild persecutory ideation. The study found only marginal support for a link between persecutory delusions and personalizing biases, suggesting this connection emerges only at delusional intensity.

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Area of Science:

  • Psychology
  • Psychiatry
  • Cognitive Science

Background:

  • Bentall's model suggests persecutory delusions arise from externalizing/personalizing attributions to avoid negative self-beliefs.
  • Attributional biases are hypothesized to play a role in the development and maintenance of persecutory ideation.

Purpose of the Study:

  • To investigate the association between attributional biases and subclinical persecutory ideation.
  • To re-examine the relationship between attributional biases and persecutory delusions.

Main Methods:

  • Two studies were conducted using the Internal, Personal and Situational Attributions Questionnaire to measure attributional style.
  • The Paranoid, Persecutory and Delusion-Proneness Questionnaire was used to measure persecutory ideation.

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Main Results:

  • No evidence was found linking attributional biases to subclinical persecutory ideation.
  • No support for an association between persecutory delusions and externalizing bias.
  • Marginal support for a link between persecutory delusions and personalizing bias.

Conclusions:

  • The link between persecutory ideation and attributional biases may only manifest at delusional intensity.
  • The association appears confined to a personalizing bias, not externalizing bias.