What is the main premise of the theory of planned behavior?

The main premise of the theory of planned behavior is that intentions, which are influenced by an individual's attitudes toward a behavior, subjective norms, and perceived behavioral control, are what guide actual behavior. This theory posits that people make rational decisions based on the information available to them, considering their beliefs and the expectations of others. Essentially, if a person has a positive attitude toward a behavior and believes that significant others approve, they are more likely to intend to perform that behavior, thereby translating their intentions into actions.

This understanding emphasizes the role of cognitive deliberation in decision-making processes, highlighting that behavior is not solely a result of past experiences or external influences alone. The other options suggest alternative influences—past experiences, genetics, and environmental factors—none of which capture the central role of intention guided by attitudes and social norms as outlined in the theory of planned behavior.