Theory of planned behaviour Flashcards
theory of reasoned action
According to the theory of reasoned action - attitudes cause behaviour.
Beliefs and Norms - Intention - Behaviour
The mediator between attitudes and behaviour is a persons intention.
Each intention and behaviour has 4 elements of : action, target, context and time.
The intention can best predict the behaviour if the degree of action, target , context and time is measured with the same specificity as of the behaviour.
Example:
Any behaviour consits of an action that is performed towards a specific target in a specific context at a specific time.
critic : this theory can only predict volitional behaviour and does not take into account skills, resources and opportunities.
theory of planned behaviour
The theory of planned action intends to broaden the theory of reasoned action through incorporating perceived behavioural control.
Perceived behavioural control subjective norm
Attitude - Intention - Behaviour
The TPB describes behaviour as a linear regression function which is combined out of the behavioural intention and the perceived behavioural control. In the regression function, both variables ( Perceived control and behaviour ) are weighted with regression weights.
critic of the TPB
- limited predictive validity
–> the results can be scewed due to measurements were not made at the same time - only for rational behaviour
–> reasoned beliefs ( which relfect also the underlying implicit believes) - is not a theory to base interventions on
–> it was not found to make interventions with. Interventions can be done with it but only with a good elicitation interview
- static
–> not true involves a feedback loop between the behaviour beliefs, control belief and behaviour.
integrated behavioural model (IBM)
this model adds to the theory of planned behaviour the category of personal agency which includes: self efficacy, efficacy beliefs, control beliefs and perceived control.
Reasoned action approach
experiential attitude ( attitude about the experience)
instrumental attitude ( attitude about the outcome of the behaviour)
injunctive norm
descriptive norm
self efficacy
perceived control
–> main difference actual control and barriers ( habit, which act as moderators to the relationship of intention and behaviour.
TPB in key terms
affective attitude, cognitive attitude make up attitudes
injunctive and descriptive norms make up the perceived norm
perceived self efficacy make up perceived behavioural control
perceived norm
attitudes perceived norm and perceived behavioural control make up a persons intentions which influences a persons behaviour.
TPB in interventions
- TPB can be a useful tool in interventions for behaviour change
- through putting the focus on the attitudes, perceived control and intentions of people - behaviour can more easily be changed.
Eliciting easily accessible behavioural, normative + control beliefs in a representative sample of the target population
▪ Selecting specific existing accessible beliefs or perhaps novel belief s
to target in thei ntervention
▪ Designing an intervention that changes the selected beliefs
▪ Testing that the intervention produces large changes in the targeted belief and does not produce any
negative effects on other beliefs
▪ Demonstrating thattheinterventionhadsignificanteffectsontheaggregateofbehavioural,
normative, and/or control beliefs (i.e. the aggregate of accessible beliefs are significantly more
favourable towards the behaviour compared with aggregate scores before the intervention)
–> the intervention is targeted to change either , control , normative or behavioural beliefs
47 studies about intention change –> behaviour change
in 47 studies interventions were tested in order to see which intervention would result in the biggest behaviour change.
It was found that a succesfull change in the intention of a person does lead to an only small to medium change in the persons behaviour.
Intention has a significant impact on behaviour but the effect is not as big as suggested by correlational research.
big norm, attitude, perceived control change –> medium change intention –> small change behaviour
Empirical study
Mevissen 2011
Is a tailored intervention most effective in promoting condom use and STI testing?
High school students participated with prior sexual experience and without.
three conditions were presented:
tailored intervention to the individual
general intervention
Afterwards the participants attitudes, risk perception as in perceived likelyhood of being infected and a the perceived risk of getting infected , self efficacy, perceived normative believes were measured.
Results:
The group with the tailored intervention was more susceptible to STI’s but did not think it was likely that they would have an STI themselves.
They had an increased intention to discuss STI testing but weren’t actually testing it themselves more.
The condom use was hightened.
After the intervention they were more likely to talk openly about it and accept it when their partner has it.
intervention method for changing behaviour
elicitation phase interview
–> most important component of designing a succesful intervention programm.
