Related Experiment Videos
Does perceived behavioural control mediate the relationship between power beliefs and intention?
Gaston Godin1, Camille Gagné, Paschal Sheeran
1Research Group on Psychosocial Aspects of Health-Related Behaviours, Faculty of Nursing Sciences, Laval University, Ste-Foy, Québec, Canada. gaston.godin@fsi.ulaval.ca
British Journal of Health Psychology
|October 29, 2004
Summary
Perceived behavioural control (PBC) only partially mediates the link between power beliefs and health intentions. Power beliefs directly influence intentions, suggesting both should be measured for better prediction.
Area of Science:
- Psychology
- Health Behavior Research
Background:
- Understanding factors influencing health behaviors is crucial for public health interventions.
- Theories suggest perceived control influences behavioral intentions, but the role of power beliefs is less clear.
Purpose of the Study:
- To investigate if perceived behavioural control (PBC) mediates the relationship between power beliefs and health-related behavioral intentions.
- To examine the direct and indirect effects of power beliefs on intentions using structural equation modeling.
Main Methods:
- Analysis of eight cross-sectional datasets (N=4663) examining health behaviors.
- Utilized validated multi-item measures for power beliefs, PBC, and behavioral intentions.
- Employed structural equation modeling to test mediation hypotheses.
Main Results:
- Confirmatory factor analysis supported the discriminant validity of power beliefs, PBC, and intention.
- Perceived behavioural control (PBC) partially mediated the relationship between power beliefs and intention (Sobel Z=5.15, p<.001; Baron & Kenny Z=5.16, p<.001).
- Power beliefs demonstrated a significant direct effect on intention, independent of PBC.
Conclusions:
- Findings challenge Ajzen's model by showing PBC does not fully mediate the power beliefs-intention link.
- Measuring power beliefs alongside PBC is essential for improving the prediction of health-related behavioral intentions.