Theory of Planned Behaviour Questionnaire

Author of Tool: 

Ajzen, I.

Key references: 

Ajzen, I. (1991) The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179–211.

Primary use / Purpose: 

Asses the main constructs of the Theory of Planned Behavior.

Background: 

According to the theory of planned behavior, human behavior is guided by three kinds of considerations:  beliefs about the likely consequences of the behavior (behavioral beliefs), beliefs about the normative expectations of others (normative beliefs), and beliefs about the presence of factors that may facilitate or impede performance of the behavior (control beliefs). In their respective aggregates, behavioral beliefs produce a favorable or unfavorable attitude toward the behavior; normative beliefs result in perceived social pressure or subjective norm; and control beliefs give rise to perceived behavioral control. In combination, attitude toward the behavior, subjective norm, and perception of behavioral control lead to the formation of a behavioral intention. As a general rule, the more favorable the attitude and subjective norm, and the greater the perceived control, the stronger should be the person’s intention to perform the behavior in question. Finally, given a sufficient degree of actual control over the behavior, people are expected to carry out their intentions when the opportunity arises. Intention is thus assumed to be the immediate antecedent of behavior. However, because many behaviors pose difficulties of execution that may limit volitional control, it is useful to consider perceived behavioral control in addition to intention. To the extent that perceived behavioral control is veridical, it can serve as a proxy for actual control and contribute to the prediction of the behavior in question. The Theory of Planned Behavior Questionnaire (TPB Questionnaire) assess each of the theory’s major constructs: Attitude, perceived norm, perceived behavioral control, and intention. Seven-point bipolar adjective scales are typically employed.

Files: 

Other Information: 

There is no official TPB questionnaire, however a sample questionnaire is provided here. The items employed in previous research and the items shown in the sample questionnaire may not be appropriate for your behavior, population, or time period. For more information, see authors FAQ page: http://people.umass.edu/aizen/faq.html 

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