Assess graduate-level understanding of four major behavior change theories—Transtheoretical Model (stages and processes), Social Cognitive Theory (self-efficacy, observational learning, outcome expectations), Health Belief Model (perceived susceptibility, severity, benefits, barriers, cues to action, self-efficacy), and Theory of Planned Behavior (attitudes, subjective norms, perceived behavioral control, intentions)—and ability to apply these constructs to design or critique strategies for promoting physical activity in adults; items will ask for definitions, comparisons, application to intervention components for different adult populations/stages, and explanation of mechanisms linking constructs to behavior change.