Which concept reflects a person's belief in their ability to carry out behavior change?

Self-efficacy refers to an individual's confidence in their ability to engage in specific behaviors or tasks successfully. This concept, rooted in social cognitive theory, affects motivation and the likelihood of behavior change. When a person believes they have the skills and capabilities to make a change, they are more inclined to take action and persisting through challenges.

In the context of behavior change, self-efficacy is particularly crucial because it influences how people approach goals, tasks, and challenges. Higher self-efficacy generally leads to a greater likelihood of initiating and maintaining behavior changes, while low self-efficacy can hinder attempts to change.

The other concepts mentioned serve different purposes. Maintenance relates to the stage of keeping a change over time but doesn't directly address belief in one's capabilities. Susceptibility is about understanding one's vulnerability to a health issue, which does not cover self-belief regarding behavior change. The Theory of Planned Behavior incorporates self-efficacy but also factors in attitudes and social norms, making it a broader framework rather than a direct representation of belief in one's capabilities alone.