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. 2008 Nov 19;3:50. doi: 10.1186/1748-5908-3-50

Figure 1.

Figure 1

The theory of planned behaviour (Ajzen, 1991). Attitude = being in favour of, or against, doing something (the behaviour). Subjective norm = perceived pressure to do, or not to do, the behaviour. Perceived Behavioural Control = perception of having, or not having, control over the behaviour.