British Record of Cultural Psychology (2001), 40, 471вЂ“499 2001 The British Psychological Society
Printed in Great Britain
EY cacy of the Theory of Planned Behaviour: A meta-analytic review Christopher M. Armitage*
Office of Psychology, University of SheYeld, UK
School of Psychology, College or university of Leeds, UK
The idea of Planned Behaviour (TPB) has received substantial attention in the literature. The modern day study can be described as quantitative the use and overview of that research. From a database of 185 self-employed studies released up to the end of 97, the TPB accounted for 27% and 39% of the difference in behaviour and intention, respectively. The perceived behavioural control (PBC) construct made up signi cannot amounts of variance in intention and actions, independent of theory of reasoned action variables. When behaviour procedures were self-reports, the TPB accounted for 11% more of the difference in conduct than when behaviour steps were aim or discovered (R2s sama dengan. 31 and. 21, respectively). Attitude, subjective norm and PBC take into account signi cantly more of the variance in individuals' desires than intentions or perhaps self-predictions, yet intentions and self-predictions were better predictors of behaviour. The very subjective norm develop is generally discovered to be a poor predictor of intentions. This is certainly partly attributable to a combination of poor measurement as well as the need for enlargement of the normative component. The topic focuses on ways that current TPB research may be taken forward in the light of the present review.
As Wicker's (1969) review of exploration examining the relationship between behaviour and behavior, and his realization that thinking probably do not predict behavior, social specialists have sought to improve the predictive power of attitudes. Lately, the main approach within this location has been to produce integrated models of behaviour, including additional determinants of behaviour such as interpersonal norms or intentions (Olson & Zanna, 1993). Probably the most broadly researched of these models would be the Theories of Reasoned Action (Ajzen & Fishbein, 80; Fishbein & Ajzen, 1975) and Planned Behaviour (Ajzen, 1988, 1991). The Theory of Planned Behavior (TPB) is basically an extension of the Theory of Reasoned Actions (TRA) that features measures of control idea and recognized behavioural control (see Fig. 1). *Request for reprints should be resolved to Frank Armitage, Hub for Analysis in Sociable Attitudes, Section of Mindset, University of SheYeld, Western Bank, SheYeld S10 2TP, UK.
Christopher T. Armitage and Mark Conner
Figure 1 ) The theory of planned actions.
Ajzen (e. g. 1991) extended the TRA to include a measure of perceived behavioural controlвЂ”a adjustable that got received a great deal of attention in social cognition models created to predict wellness behaviours (e. g. overall health belief unit, protection inspiration theory; discover Armitage & Conner, 2000; Conner & Norman, 1996a). Perceived behavioural control (PBC) is kept to in uence both intention and behaviour (see Fig. 1). The rationale in back of the addition of PBC was that it could allow prediction of behaviours that were certainly not under complete volitional control. Thus, even though the TRA can adequately forecast behaviours which were relatively easy (i. e. under volitional control), underneath circumstances high were limitations on actions, the pure formation of your intention was insuYcient to predict behavior. The inclusion of PBC provides information about the potential limitations on actions as recognized by the actor, and is organised to explain how come intentions tend not to always forecast behaviour. 1 With respect to the in uence of PBC in intention, Ajzen (1991, p. 188) claims that: вЂThe relative need for attitude, very subjective norm, and perceived behavioral control inside the prediction of intention can be expected to differ across behaviors and situations'. That is, in situations where...