Part 2 of the questionnaire consisted of an 18-item scale
measuring the respondent’s perceptions of the risks associated with a number of potential causes of motorcycle
accidents (Appendix 1). These items have been validated
and demonstrate high internal consistency among the subscales (Cronbach’s alphaZ.742e.898). The scale assesses
the perceptions of Chinese motorcyclists (Cheng & Ng,
2012) of the risk associated with the potential causes of
traffic accidents grouped along three dimensions (driving,
environmental, and belief related). The participants were
asked to indicate whether or not they thought each risk was
a cause of accident using a 5-point Likert scale ranging from
1 (strongly disagree) to 5 (strongly agree).
Part 3 of the questionnaire consisted of a 19-item scale
measuring self-reported driving-violation behaviours
(Appendix 2). The measure yields a total score comprised of
two subscales measuring ordinary and aggressive violations,
respectively. The internal consistency (Cronbach’s alpha)
of these two subscales ranges from .876 to .914 (Cheng &
Ng, 2010). The participants were asked to indicate how
often they had committed each of the violations during the
past 6 months using a 5-point Likert scale ranging from 1
(never) to 5 (very often). A high score indicates a greater
degree of driving-violation behaviour.
A total of 774 questionnaires were sent out, of which 621
were returned fully completed. This resulted in a response
rate of 80.23%. All participants replied to the questionnaire
anonymously and voluntarily.