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The theory was elaborated by Icek Ajzen for the purpose of improving the predictive power of the theory of reasoned action (TRA). Ajzen's idea was to include perceived behavioral control in TPB. [1] Perceived behavior control was not a component of TRA.
Icek Ajzen (born 1942, Chełm, Poland) is a social psychologist and professor emeritus at the University of Massachusetts Amherst. He received his doctorate from the University of Illinois at Urbana–Champaign , and is best known for his work, with Martin Fishbein , on the theory of planned behavior . [ 1 ]
In 1985, Ajzen extended TRA to what he refers as the theory of planned behavior (TPB). This involves the addition of one major predictor—perceived behavioral control. [ 24 ] This addition was introduced to account for times when people have the intention to conduct the behavior, but the actual behavior is thwarted because of subjective and ...
Each behavioural change theory or model focuses on different factors in attempting to explain behaviour change. Of the many that exist, the most prevalent are learning theories, social cognitive theory, theories of reasoned action and planned behaviour, transtheoretical model of behavior change, the health action process approach, and the BJ Fogg model of behavior change.
In the late 1970s and early 1980s, Fishbein and Ajzen expanded expectancy–value theory into the theory of reasoned action (TRA). Later Ajzen posited the theory of planned behavior (TPB) in his book Attitudes, Personality, and Behavior (1988). Both TRA and TPB address predictive and explanatory weaknesses with EVT and are still prominent ...
The reasoned action approach is the latest version of the theoretical ideas of Martin Fishbein and Icek Ajzen, following the earlier theory of reasoned action [2] and the theory of planned behavior. [3] Those theoretical ideas have resulted in over a thousand empirical studies in behavioral science journals.
Icek Ajzen has led research and helped develop two prominent theoretical approaches within this field: the theory of reasoned action [36] and, its theoretical descendant, the theory of planned behavior. [37] Both theories help explain the link between attitude and behavior as a controlled and deliberative process.
Theory of Planned Behavior . The Theory of Planned Behaviour, developed by Martin Fishbein and Izek Ajzen, suggests that people act rationally and their behaviours are influenced by intentions. [1] There are three key variables that jointly predict our intentions: The attitude toward the behaviour; Subjective norms