This document discusses several theories related to health behavior and perceptions of health, including:
1) The Health Belief Model, which proposes that health-related actions are influenced by perceptions of susceptibility, severity, benefits, costs and cues to action.
2) Protection Motivation Theory, which suggests that protective health behaviors stem from threat and coping appraisals related to susceptibility, severity, self-efficacy and response-efficacy.
3) The Theory of Planned Behavior, in which intentions and behaviors are influenced by attitudes, subjective norms and perceived behavioral control.