What is Theory of Planned Behavior

was proposed by Icek Ajzen in 1985 to predict an individual's intention to engage in a behavior at a specific time and place. The theory indicates that six constructs that collectively represent a person's actual control over the behavior: attitudes, behavioral intention, subjective norms, social norms, perceived power, perceived behavioral control.

This theory looks at the motivation behind a deliberate behavior by looking at intentions and perceived control.

A framework for studying human action and behavior. Specifically, the intention is influenced by three determinants, namely a) attitude that leads to a desired or unwanted behavior, b) subjective norms, which are affected or perceptions of social pressure or people around, and c) notions of perceived behavioral control to increase self-confidence to control the behavior.

It states that attitude towards a behavior, subjective norms and perceived behavioral control drives the specific behavior of an individual.

An extended concept of predicting behavior in any social situation. It proposes intention to behavior as the most recent antecedent of a specific behavior.

For online shopping, the theory suggests that a consumer’s purchase intention depends on his/her attitude about the purchase, subjective norms, and perceived behavior control. Also, a consumer’s purchase intention leads to his/her actual purchase behavior.