Self-efficacy refers to an individual's belief in their own ability to complete a specific task. People's self-efficacy determines whether they will attempt a task, how much effort they will expend, and how long they will persist in the face of challenges. Higher self-efficacy is associated with better performance outcomes, as those with high self-efficacy are more likely to try hard and succeed. Self-efficacy beliefs are shaped by factors such as past successes, observing others, verbal persuasion, and physiological states.