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Psych - Health
Psychology - Health - Theory of Planned Behaviour
Term | Definition |
---|---|
Who proposed the Theory of planned behaviour (TPB)? | Ajzen (1985, 1991) |
What does the TPB explain? | how people control voluntary behaviours |
What is the central concept of TPB? | intention, which is affected by 3 sources |
What are the 3 sources of TPB? | 1) personal attitudes 2) subjective norms 3) perceived behaviour control (PBC) |
What are 'personal attitudes'? | balance of the person's favourable and unfavourable attitudes towards own behaviour |
What are 'subjective norms'? | person's beliefs about whether people who matter to them approve or disapprove of their behaviour |
What is 'perceived behavioural control'? | how much control we perceive we have over own behaviour |
Which research support TPB? | Hagger et al. 2011 |
What did Hagger et al. 2011 show? | attitudes, norms and PBC influenced intentions, which then influenced actual alcohol consumption |
What did Miller and Howell, 2005 show? | gambling behaviour of teenagers not predicted by intentions and TPB not useful for interventions |
What did Louis et al. 2009 show? | attitudes, norms & PBC all affected by stress, so do not predict behaviour in way TPB suggests |
What did McEachan et al. 2011 show? | intention is a good predictor of not drinking within 5 weeks but not over longer period, so TPB not applicable to real-life behaviour change |