Assess graduate-level understanding of core constructs and causal mechanisms of major behavior change theories (e.g., Social Cognitive Theory, Theory of Planned Behavior, Transtheoretical Model, Self-Determination Theory, Health Belief Model) as applied to physical activity promotion. Test identification and comparison of key constructs (self-efficacy, attitudes, intentions, stages, autonomy), proposed pathways and mediators/moderators, implications for intervention strategies and measurement, and the ability to critique theory selection and integration in empirical studies.