Theory of planned behaviour

• Who came up with the theory of planned behaviour?

  Azjen (1991)
• What is the theory of planned behaviour?

  A theoretical model that attempts to describe the components involved in making a behavioural decision
• What factors are discussed in the theory of planned behaviour?

  Personal attitudes

  Subjective norms

  Perceived behavioural control
• What is self-efficacy?


  The persons belief in their ability to carry out a behaviour
• Who supports the theory of planned behaviour?

  Hager (2011) - all 3 factors predicted an intention to limit drinking to the guideline of units
• What does the theory of planned behaviour not take into account?

  Emotions, these may explain irrational behaviour
• What technique assesses intention?

  Self report
• What other factors could influence behaviour?

  Group variables like identification with peers
• Does intention predict behaviour?

  It may be an oversimplification - intention is necessary but not enough