In the analyses predicting participants’ consumption of foods
low in saturated fats, the preliminary steps of the model revealed
that both intention and PBC predicted behaviour directly. These
findings are consistent with previous TPB studies examining
healthy eating behaviours (e.g., Payne et al., 2004). However, once
planning was added to the model in a subsequent step, neither
intention nor PBC remained as significant predictors of behaviour
suggesting that planning may perform a mediational role in the
relationship between both intentions and PBC and subsequent
behaviour. As would be expected, past behaviour also predicted
people’s consumption of foods low in saturated fats directly,
providing support for the role that people’s previous dietary
choices plays in predicting their current and future healthy eating
decisions (e.g., A˚ strøm & Rise, 2001).