Planned Behaviour Software Tool 2

The Theory of Planned Behavior (TPB) of Icek Ajzen (1988, 1991) helps to understand how we can change the behavior of people. The TPB is a theory which predicts deliberate behavior, because behavior can be deliberative and planned. TPB is the successor of the similar Theory of Reasoned Action of Ajzen and Fishbein (1975, 1980). The succession was the result of the discovery that behavior appeared not to be 100% voluntary and under control, which resulted in the addition of perceived behavioral control. With this addition the theory was called the Theory of Planned Behavior. According to TPB, human action is guided by three kinds of considerations (see elements): Ajzens three considerations are crucial in circumstances / projects / programs when changing behavior of people. 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. Recently (2002) Ajzen investigated Residual Effects of Past on Later Behavior. He came to the conclusion that this factor indeed exists but cannot be described to habituation as many people think. A review of existing evidence suggests that the residual impact of past behavior is attenuated when measures of intention and behavior are compatible and vanishes when intentions are strong and well formed, expectations are realistic, and specific plans for intention implementation have been developed. A research project in the travel industry resulted in the conclusion that past travel choice cont