Acceptability, reliability, and validity of a brief measure of capabilities, opportunities, and motivations (“COM‐B”)

Abstract

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 (testretest 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, (v 2 [6] = 7.34, p = .29, RMSEA = .02, CFI = .99, TLI = .99, BIC = 13,510.420, AIC = 13,428.067).Conclusions. The novel six-item questionnaire shows evidence of acceptability, validity, and reliability for self-evaluating capabilities, opportunities, and motivations. Future research should aim to use this tool in different populations to obtain further support for its reliability and validity.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

The perceived impact of Covid-19 on periodontal practice in the United Kingdom: A questionnaire study

“…• Participants demographics (e.g. age, gender, ethnicity, professional group) • Previous COVID-19 symptoms/diagnosis • Perceived effects of COVID-19 on professional practice • Perceived support from the Government and General Dental Council (GDC) • Infection control measures (procedures in place in order to reduce the risk of infection within the dental practice) • A COM-B part consisting of questions on returning to practice [16] Questions were constructed by a multidisciplinary team of periodontists and psychologists and aimed to assess the various impacts of the pandemic on dental practice. Items were constructed with standard psychometric procedures in mind and most were assessed using a 5point Likert scales.…”

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Improving Mental Health Help-Seeking Behaviours for Male Students: A Framework for Developing a Complex Intervention

“…Following the identification of these factors, it is important that they are implemented and operationalised appropriately. To do so, the Capability, Opportunity, and Motivation model of Behaviour (COM-B) was selected as it has predictive validity on the delivery of behaviour change interventions [100,101]. The COM-B model is a behaviour system that draws on the interaction between capability, opportunity, and motivation to generate a behaviour, in this case help-seeking [100].…”