The health belief model addresses three factors that must exist before a person can make a change: the perceived seriousness of the potential health problem; the perceived susceptibility to the problem, and cues to action, alerts or reminders to take preventive action.2. The social cognitive model is based on the concept that three elements interact to motivate and enable change: a person's thoughts, behaviors, and the social environment.3. The transtheoretical model views change in six stages: precontemplation, contemplation, preparation, action, maintenance, and termination.