Personal beliefs about illness questionnaire-revised (PBIQ-R): Reliability and validation in a first episode sample
Article first published online: 6 JUN 2012
©2012 The British Psychological Society
British Journal of Clinical Psychology
Volume 51, Issue 4, pages 448–458, November 2012
How to Cite
Birchwood, M., Jackson, C., Brunet, K., Holden, J. and Barton, K. (2012), Personal beliefs about illness questionnaire-revised (PBIQ-R): Reliability and validation in a first episode sample. British Journal of Clinical Psychology, 51: 448–458. doi: 10.1111/j.2044-8260.2012.02040.x
- Issue published online: 19 OCT 2012
- Article first published online: 6 JUN 2012
- Received 17 August 2010; revised version received 2 March 2012
Objective. To further develop the Personal Beliefs about Illness Questionnaire (PBIQ), which reflects current constructs of social rank theory in relation to people experiencing psychosis.
Method. Drawing on extensive clinical and research experience and after consultation with other mental health professionals and service users, 17 new items were added to 12 from the original 16 PBIQ questions. These made up five theoretical constructs (entrapment, loss, social marginalization, shame, and control). A total of 150 people who had just experienced a first episode of psychosis completed the newly devised PBIQ-R. To test the validity of its five subscales, a small sub-sample (N= 66) for whom follow-up data was available also completed measures of depression, insight, and other social rank appraisals.
Results. All five subscales of the PBIQ-R were found to be reliable, valid, and sensitive to change.
Conclusions. Although the PBIQ-R was not designed to produce an overall ‘personal beliefs about illness’ score, its five subscales provide a rapid and valid method to assess and measure common psychological reactions to a first episode of psychosis. It will have relevance for use in older, multiple episode samples although further validation may be needed.