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Measuring Adherence in CBT for Psychosis: A Psychometric Analysis of an Adherence Scale

Published online by Cambridge University Press:  31 October 2007

Rebecca Rollinson ,
Ben Smith ,
Craig Steel ,
Suzanne Jolley ,
Juliana Onwumere ,
Philippa A. Garety ,
Elizabeth Kuipers ,
Daniel Freeman ,
Paul E. Bebbington  and
Graham Dunn
...Show all authors
Rebecca Rollinson*
Affiliation:
University of East Anglia, UK
Ben Smith
Affiliation:
University College London, UK
Craig Steel
Affiliation:
University College London, UK
Suzanne Jolley
Affiliation:
Kings College London, UK
Juliana Onwumere
Affiliation:
Kings College London, UK
Philippa A. Garety
Affiliation:
Kings College London, UK
Elizabeth Kuipers
Affiliation:
Kings College London, UK
Daniel Freeman
Affiliation:
Kings College London, UK
Paul E. Bebbington
Affiliation:
University College London, UK
Graham Dunn
Affiliation:
University of Manchester, UK
Mike Startup
Affiliation:
University of Newcastle, Australia
David Fowler
Affiliation:
University of East Anglia, UK
*
Reprint requests to Rebecca Rollinson, Psychological Therapies and Primary Care Service, Community Resource Centre, Northgate Hospital, Great Yarmouth NR35 1BU, UK. E-mail: rebecca.rollinson@nwmhp.nhs.uk
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Abstract

This paper reports the psychometric properties of a CBT for psychosis adherence scale, the Revised Cognitive Therapy for Psychosis Adherence Scale (R-CTPAS). The scale's factor structure, inter-rater reliability and concurrent validity were analysed in a sample of 67 audiotaped sessions of CBT for psychosis. The concurrent validity of the scale was examined through comparison with the Cognitive Therapy Scale (CTS, Young and Beck, 1980). Principal components analysis of the trial data suggested three factors: “engagement/assessment work”, “relapse prevention work” and “formulation/schema work”. Satisfactory levels of inter-rater reliability were established between rater dyads. Moderate correlations with the CTS provided an indication of concurrent validity. The R-CTPAS is concluded to be a reliable and useful instrument that can assess adherence to CBT for psychosis using the Fowler, Garety and Kuipers (1995) therapy model.

Keywords

FidelityadherencecompetenceCBTpsychosis
Type
Research Article
Information
Behavioural and Cognitive Psychotherapy , Volume 36 , Issue 2 , March 2008 , pp. 163 - 178
Copyright
Copyright © British Association for Behavioural and Cognitive Psychotherapies 2007

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