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The present study examined the moderating role of conscientiousness within the theory of planned behavior (TPB) for exercise behavior during usual vs. unusual context. Affective and cognitive attitude, subjective and descriptive norm, perceived behavioral control, behavioral intention, past behavior, conscientiousness, and self-reported behavior were assessed in relation to exercising in a sample of university students (n = 146). Conscientiousness was found to significantly moderate the intention–behavior relationship when the behavior was performed in unusual context (exercising during a reading week of term), but not when behavior was performed in usual context (exercising during a normal week of term). The find-ings indicate a role for conscientiousness in understanding intention–behavior relationships when the context of behavior is changing or unknown.
Conner is with the Institute of Psychological Sciences, University of Leeds, Leeds, U.K., and Rodg-ers and Murray are with the Faculty of Physical Education and Recreation, University of Alberta, Edmonton, AB, Canada.