Intrinsic motivation is the desire to perform a behavior for its own sake. The activity is inherently interesting or satisfying; no external reward is required to sustain it.

Children at play, scientists pursuing a question out of curiosity, and musicians practicing for the pleasure of the music itself are displaying intrinsic motivation. Self-determination theory identifies autonomy, competence, and relatedness as the psychological needs that support intrinsic motivation. When these needs are met, engagement is deeper, creativity is higher, and persistence is greater than when behavior is driven only by external incentives.

Extrinsic rewards can undermine intrinsic motivation when they are perceived as controlling. A child who loves drawing may draw less once stickers are introduced as payment. The effect is not inevitable; rewards that affirm competence without pressuring can coexist with intrinsic interest. Educational and workplace settings that support autonomy tend to foster more intrinsic motivation than those that rely heavily on surveillance and contingent rewards.

When the doing is itself the reason for doing, motivation is intrinsic.