Chan, Derwin King Chung, Hardcastle, Sarah, Dimmock, James A., Lentillon-Kaestner, Vanessa, Donovan, Robert J., Burgin, Matthew, and Hagger, Martin S. (2015) Modal salient belief and social cognitive variables of anti-doping behaviors in sport: examining an extended model of the theory of planned behavior. Psychology of Sport and Exercise, 16 (Part 2). pp. 164-174.

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Abstract

Objectives: This study examined the modal salient behavioral, normative, and control beliefs within the theory of planned behavior (TPB) in the context of anti-doping in sport. We tested the efficacy of four hypothesized expectancy-value models as predictors of the directly-measured social-cognitive components of the TPB toward doping avoidance: attitude, subjective norm, perceived behavioral control (PBC), and intention.

Methods: After developing the belief-expectancy and belief-value of modal salient beliefs items based on a pilot belief-elicitation study of young elite athletes (N=57, mean age=18.02), 410 young athletes (mean age=17.70) completed questionnaire items of the modal salient beliefs and direct measures of the social-cognitive components of doping avoidance. Variance-based structural equation modeling was used to examine the four proposed expectancy-value models.

Results: Belief-expectancies, belief-values, and the expectancy-belief multiplicative composites formed positive associations with their corresponding social cognitive variables. The model in which belief-expectancies were the sole predictors of the social cognitive provided the most parsimonious and reliable model to explain the relationship between modal salient beliefs and directly-measured social-cognitive variables for doping avoidance in sport.

Conclusion: Belief-expectancies including behavioral belief strength (e.g., "doping avoidance is likely to ease the worry of being caught doping"), normative belief strength ("my coach thinks that I should avoid doping") and control belief strength ("I expect I have power to 'say no' to doping") are the belief-based components that underpin direct measures of the social-cognitive variables from the TPB with respect to doping avoidance.

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