Issue addressed With no efficacious treatments or vaccines available, social distancing measures remain the most effective approach for reducing the transmission of the COVID‐19 virus. However, adherence to social distance measures presumably requires knowledge and understanding of the current social distancing restrictions. Methods A modified version of the Theory of Planned Behaviour examined the role of knowledge and understanding of current social distancing measures in predicting intentions to adhere to social distancing restrictions. An online survey was administered to respondents (N = 374) in Melbourne, Australia during a period of heightened social distancing restrictions. In addition to measuring respondents’ general intentions to adhere to restrictions, vignettes were used to assess intended behaviour in specific situations. Results Knowledge of social distancing restrictions predicted intentions to adhere in specific situations, but not general intentions to adhere. Knowledge of restrictions also predicted positive attitudes towards current restrictions and a greater perceived ability to adhere to the restrictions, while positive attitudes was a good predictor of both general and specific intentions to adhere. Conclusions The findings suggest that attitudes towards restrictions may influence whether individuals attempt to adhere to restrictions, but knowledge of the restrictions influences whether the intended behaviour actually adheres to current restrictions. So what? These outcomes indicate that members of the public should be educated regarding the negative consequences associated with the COVID‐19 virus and the capacity of social distancing to reduce transmission of the virus, and a need for social distancing restrictions to be uncomplicated and clearly communicated.

Pandemics are associated with high rates of morbidity and mortality, and the coronavirus disease (COVID-19) pandemic has been the most fatal coronavirus outbreak of the 21st century. To reduce person-to-person transmission, interventions such as social distancing have been recommended; however, it is anticipated that 80% compliance is required to control the outbreak. A questionnaire was used to assess the factors related to compliance with social distancing restrictions using a modified version of the Theory of Planned Behavior (TPB) that included participants’ understanding of restrictions. The questionnaire included 18 vignettes (violating, non-violating and ambiguous) to assess participants’ knowledge of the social distancing restrictions and intentions to violate them. Participants were also presented the social distancing restrictions relevant at the time of completion and they were asked to consider the restrictions when anticipating their behavior in the vignettes. In line with the predictions of the TPB, intentions to adhere to restrictions and perceived behavioral control predicted participants’ self-reported behaviors. Further, attitudes (ATT) toward social distancing restrictions and knowledge of the restrictions predicted intentions to adhere to them. Public health messaging should aim to increase the understanding of the restrictions, e.g. through the use of example scenarios of permitted and prohibited behaviors. This would be particularly beneficial when changes are implemented to promote the understanding of the restrictions and positive ATT toward them.