Brief explanation of the theory of Reasoned action and the theory of planned behaviour.

1. Theory of Reasoned Action and
Theory of Planned Behaviour
explained.

2. Fishbein and Ajzen’s theory of Reasoned
Action
Originally developed in 1967
Commonly used to study human behaviour
Fishbein and Ajzen were both working on similar concepts to study
human behaviour
They collaborated and published the theory in 1980

3. History of the model
Originated in the field of social psychology
The concept of attitude as a trigger and predictor of human
behaviour
Value-Expectancy theory

4. Assumptions of the model
Human behaviour is the voluntary control of the individual
People think about the consequences and implications of thei
behaviour and actions then decide to act upon them
Therfore, intentions must be highly correletaed with behaviour

5. Components of the model
Behaviour is a function of two things;
Attitudes towards a specific action
-what will happen if I engage in this behaviour
-is this outcome desirable or undesirable
Subjective norms regarding that action
Normative beliefs: other expectations
Motivation to comply: mixed emotions

6. What is NOT in the model
Other factors such as modifying factors in the HBM(demographics
etc) are not directly addressed.
They can have an indirect effect on the other components, but are
not specifically incorporated into the model