Modeling Health Behavior Change: How to Predict and Modify the Adoption and Maintenance of Health Behaviors

Health‐compromising behaviors such as physical inactivity and poor dietary habits are difficult to change. Most social‐cognitive theories assume that an individual's intention to change is the best direct predictor of actual change. But people often do not behave in accordance with their intentions. This discrepancy between intention and behavior is due to several reasons. For example, unforeseen barriers could emerge, or people might give in to temptations. Therefore, intention needs to be supplemented by other, more proximal factors that might compromise or facilitate the translation of intentions into action. Some of these postintentional factors have been identified, such as perceived self‐efficacy and…