Disappointment is the feeling of issatisfaction that follows the failure of expectations to manifest. Similar to regret, it differs in that the individual feeling regret focuses primarily on personal choices contributing to a poor outcome, while the individual feeling disappointment focuses on outcome. It is a source of psychological stress. The study of disappointment—its causes, impact and the degree to which individual decisions are motivated by a desire to avoid it—is a focus in the field of decision analysis, as disappointment is one of two primary emotions involved in decision-making.