The propensity to act as proposed by Shapero and Sokol (1982) concerns the disposition to act upon one’s decisions. This reflects the volitional component of intention (‘Will I actually do it?’). It seems difficult to imagine well-formed intentions without a significant propensity to
act (Bagozzi and Yi 1989): one is unlikely to have serious intentions towards a behaviour without perceiving a likelihood of taking action. Moreover, propensity to act moderates other relationships in the model (Krueger 1993), which suggests that propensity to act might be better viewed as a moderating influence rather than a direct antecedent.