Motivation refers to factors that energize and direct behavior. There are four main components in the model of motivation: needs, drives, incentives, and goals. Needs are internal deficiencies that create tension and lead to drives, which motivate behavior to reduce discomfort. Incentives are external stimuli that pull behavior toward rewards. The goal is to reduce tension by meeting needs. There are intrinsic motivations from enjoyment of an activity and extrinsic motivations from external rewards. Motives include primary biological needs for survival and secondary learned needs from social interaction.