This chapter summarises recent work by the Manchester Driver Behaviour Group. The authors begin by briefly outlining the research which indicates why it is important to understand the attitudes, beliefs and motivations behind violations on the road. They summarise the work they have done in applying, extending and developing the Theory of Planned Behaviour (TPB) approach. As an aid to other researchers wishing to apply the TPB in this domain, they illustrate the operationalisation and measurement of theory components. This covers both core components of the theory - attitude to the behaviour, subjective norm, perceived behavioural control, and behavioural intentions - and additional components that the authors have used in their research - personal norm (anticipated regret and moral norm), positive and negative affective beliefs, habit and personal identity. The final section of the chapter summarises data from four studies indicating how predictive power has been increased by the inclusion of these additional measures.
Abstract