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Predicting adherence to COVID-19 behavioural guidelines: a comparison of Protection Motivation Theory and the Theory
1School of Behavioral Sciences, The Academic College of Tel Aviv-Yaffo, Tel Aviv, Israel.
Objective:
To compare the utility of Protection Motivation Theory (PMT) and the Theory of Planned Behaviour (TPB) for understanding diversity in adherence to COVID-19 behavioural guidelines.
Methods And Measures:
A representative sample (N = 600) completed two online questionnaires: One that included measurements of PMT and TPB components that predict behaviour, and another (after one week) consisting of adherence to COVID-19 behavioural guidelines. TPB was represented by a single model, while PMT was represented by three models: Model 1, which did not include a measure of protection motivation; Model 2, which included protection motivation - represented by behavioural intentions; and Model 3, which was similar to Model 2 and included a direct link from self-efficacy to behaviour.
Results:
The TPB model displayed the best fit-to-complexity ratio (i.e. information criterion), and its capacity to explain adherence was similar to PMT Models 1 and 2, but lower than Model 3.
Conclusion:
The findings highlight the need to reach a consensus regarding the definition and measurement of protection motivation. While the TPB model exhibited superior fit-to-complexity ratio, variance was better explained when self-efficacy was included, and interventions may benefit from targeting different constructs depending on the context.
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