Final answer:
The Theory of Planned Behavior relies on the assumption that behavior is influenced by attitudes, subjective norms, and perceived behavioral control.
Step-by-step explanation:
The Theory of Planned Behavior is a psychological theory that seeks to predict human behavior based on three key assumptions: the attitude towards the behavior, the subjective norms, and the perceived behavioral control. First, it assumes that individuals have a favorable or unfavorable evaluation of the behavior in question. This attitude is made up of three components: affective (feelings), behavioral (the effects of the attitude on behavior), and cognitive (beliefs and knowledge). Second, the theory posits that subjective norms, or the perceived social pressure to perform or not perform the behavior, also influence intention. Finally, it assumes that individuals must believe they have a certain level of control over the behavior, known as perceived behavioral control. This control influences both the intention to engage in the behavior and the behavior itself.