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Int J Behav Nutr Phys Act. 2008 Feb 1;5:7. doi: 10.1186/1479-5868-5-7.

Moderators of the intention-behaviour and perceived behavioural control-behaviour relationships for leisure-time physical activity.

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  • 1Department of Social and Preventive Medicine, Division of Kinesiology, Laval University, Québec, Québec, Canada.

Abstract

BACKGROUND:

Intention is a key determinant of action. However, there is a gap between intention and behavioural performance that remains to be explained. Therefore, the aim of this study was to identify moderators of the intention-behaviour and perceived behavioural control (PBC)- behaviour relationships for leisure-time physical activity.

METHOD:

This was tested in reference to Ajzen's Theory of Planned Behaviour. A sample of 300 volunteers, 192 women and 108 men, aged 18 to 55, participated in the study. At baseline, the participants completed a self-administrated psychosocial questionnaire assessing Ajzen's theory variables (i.e., intention and perceived behavioural control). The behavioural measure was obtained by mail three months later.

RESULTS:

Multiple hierarchical regression analyses indicated that age and annual income moderated the intention-behaviour and PBC-behaviour relationships. However, in the final model predicting behaviour (R2 = .46), only the interaction term of PBC by annual income (beta = .24, p = 0.0003) significantly contributed to the prediction of behaviour along with intention (beta = .49, p = 0.0009) and past behaviour (beta = .44, p < 0.0001).

CONCLUSION:

Physical activity promotion programs would benefit not only from focusing on increasing the intention of low intenders, but also from targeting factors that moderate the perceived behavioural control-behaviour relationships.

PMID:
18241339
[PubMed]
PMCID:
PMC2275296
Free PMC Article
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