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The Perseverative Thinking Questionnaire in Patients with Persecutory Delusions.

Emma Černis1, Graham Dunn2, Helen Startup3

  • 1University of Oxford,UK.

Behavioural and Cognitive Psychotherapy
|August 25, 2015
PubMed
Summary

The Perseverative Thinking Questionnaire (PTQ) effectively measures ruminative negative thinking in individuals with persecutory delusions. This study validates the PTQ

Keywords:
Perseverative Thinking QuestionnaireRuminationparanoiapersecutory delusionspsychosisschizophrenia

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Area of Science:

  • Psychiatry and Psychology
  • Clinical Psychology
  • Cognitive Behavioral Therapy

Background:

  • Ruminative negative thinking is a key factor in emotional disorders and persecutory delusions in psychosis.
  • The Perseverative Thinking Questionnaire (PTQ) is a transdiagnostic, content-free measure of ruminative negative thinking.

Purpose of the Study:

  • To evaluate the psychometric properties of the PTQ in patients experiencing psychosis.
  • To assess the PTQ's validity and reliability in a clinical psychosis sample.

Main Methods:

  • 142 patients with persecutory delusions and 273 non-clinical participants completed the PTQ.
  • Confirmatory factor analysis examined the PTQ's factor structure in the clinical group.
  • Criterion reliability was assessed by comparing clinical and non-clinical groups.

Main Results:

  • The PTQ's three-factor structure (core characteristics, perceived unproductiveness, mental capacity capture) was replicated in the psychosis sample.
  • Patients with persecutory delusions reported significantly higher levels of ruminative negative thinking than the general population.
  • The PTQ demonstrated high internal reliability within the clinical sample.

Conclusions:

  • The study supports the validity of the PTQ for measuring negative ruminative thinking in psychosis patients.
  • Further research should include test-retest data and comparisons with measures of depressive rumination.