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Prediction of behaviour vs. prediction of behaviour change: The role of motivational moderators in the theory of planned behaviour

Lookup NU author(s): Professor Falko Sniehotta, Professor Vera Araujo Soares

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Abstract

Research has identified moderating variables of the cognition-behaviour relationship in the Theory of Planned Behaviour (TPB). These include intention certainty, affective-cognitive congruence of attitudes, attitudinal ambivalence, and past behaviour. It has not yet been systematically tested if these moderators apply in similar ways to the prediction of behaviour and behaviour change (when past behaviour is controlled). A sample of 1,418 university students completed measures of the direct predictors of the TPB (perceived behavioural control; PBC and intention), intention certainty, affective-cognitive congruence of attitudes, attitudinal ambivalence, and the Godin Leisure Time Physical Exercise Questionnaire at the beginning of the academic year and two months later. Data were analysed using moderated hierarchical linear regressions. Without controlling for baseline behaviour, intention certainty and affective-cognitive congruence moderated both the intention-behaviour and PBC-behaviour relationships and showed additional main effects. Attitudinal ambivalence did not contribute to the prediction. When past behaviour was controlled, the main effects were attenuated and only the intention certainty* PBC interaction remained significant. Predictors of behaviour do not necessarily predict behaviour change. The TPB-related moderators studied here weakly contributed to the prediction of behaviour change. Proposals for increasing the predictive power of TPB for behaviour change are discussed.


Publication metadata

Author(s): Skar S, Sniehotta FF, Araujo-Soares V, Molloy GJ

Publication type: Article

Publication status: Published

Journal: Applied Psychology

Year: 2008

Volume: 57

Issue: 4

Pages: 609-627

ISSN (print): 0269-994X

ISSN (electronic): 1464-0597

Publisher: Wiley-Blackwell Publishing Ltd.

URL: http://dx.doi.org/10.1111/j.1464-0597.2008.00346.x

DOI: 10.1111/j.1464-0597.2008.00346.x


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