This study applied the Theory of Planned Behaviour to the prediction of (1) intention
and (2) behaviour. Seventy-eight respondents from the Financial, Construction and
Medical (Public Hospital) sectors took part in this study (N = 78) which was a mixed
(within and between) design. A convenience sampling method was employed. Time
1 questionnaires (consisting of thirteen questions) were completed prior to the
Smoking Ban. Time 2 questionnaires (consisting of twelve questions) were
completed two months after legislation had been implemented. The dependent
variable in the first analysis (the prediction of intention) was intention. The
Independent variables were attitudes, subjective norm and perceived behavioural
control. The dependent variable in the second analysis was behaviour (Intention2).
The Independent Variables were intention, perceived behavioural control, attitudes
and subjective norm. Data was analysed using Standard Linear regression. In the first
analysis intention the Theory of Planned Behaviour variables were found to explain
22% of the variance in the Dependent variable intention.
R2 = 22, F = 7.11, P < .000.
In the second analysis The TPB variables were found to explain 23 % of the variance
R2 = 23%, F = 5.56, P <.000.