Acceptability, reliability, and validity of a brief measure of capabilities, opportunities, and motivations ("COM-B").
COM-B
behaviour change
health behaviour
questionnaire
Journal
British journal of health psychology
ISSN: 2044-8287
Titre abrégé: Br J Health Psychol
Pays: England
ID NLM: 9605409
Informations de publication
Date de publication:
09 2020
09 2020
Historique:
received:
02
10
2019
revised:
23
03
2020
pubmed:
22
4
2020
medline:
18
12
2020
entrez:
22
4
2020
Statut:
ppublish
Résumé
Objectives The Capabilities, Opportunities, Motivations, Behaviour (COM-B) model is being used extensively to inform intervention design, but there is no standard measure with which to test the predictive validity of COM or to assess the impact of interventions on COM. We describe the development, reliability, validity, and acceptability of a generic 6-item self-evaluation COM questionnaire. Design and methods The questionnaire was formulated by behaviour change experts. Acceptability was tested in two independent samples of health care professionals (N = 13 and N = 85, respectively) and a sample of people with low socio-economic status (N = 214). Acceptability (missing data analyses and user feedback), reliability (test-retest reliability and Bland-Altman plots) and validity (floor and ceiling effects, Pearson's correlation coefficient [r], exploratory factor analysis [EFA], and confirmatory factor analysis [CFA] were tested using a national survey of 1,387 health care professionals. Results The questionnaire demonstrated acceptability (missing data for individual items: 5.9-7.7% at baseline and 18.1-32.5% at follow-up), reliability (ICCs .554-.833), and validity (floor effects 0.6-5.5% and ceiling effects 4.1-22.9%; pairwise correlations rs significantly <1.0). The regression models accounted for between 21 and 47% of the variance in behaviour. CFA (three-factor model) demonstrated a good model fit, (χ
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
474-501Informations de copyright
© 2020 The Authors. British Journal of Health Psychology published by John Wiley & Sons Ltd on behalf of British Psychological Society.
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