Self-efficacy is best described as:

• A. Perceived social support
• B. Knowledge of medical facts
• C. Attitudes toward the behavior
• D. Confidence in one's ability to complete tasks and reach goals

Answer: (D)

Self-efficacy is confidence in one's ability to organize and execute the actions required to manage prospective situations and reach goals. This belief drives effort, persistence, and resilience when challenges arise, making a person more likely to start and maintain health behaviors and to keep going after setbacks. It differs from perceived social support, which is about help from others; from knowledge of medical facts, which is cognitive information; and from attitudes toward the behavior, which involve evaluation rather than capability. For example, a patient who believes they can follow an exercise plan and monitor symptoms is more likely to adhere and persist than someone who only knows the facts but doubts their own ability. Therefore, this choice accurately captures the idea of confidence in one’s ability to complete tasks and reach goals.