A macro-theory of human motivation developed by Edward Deci and Richard Ryan that identifies three basic psychological needs: autonomy, competence, and relatedness. When these needs are met, people experience greater motivation, well-being, and personal growth.
Self-determination theory (SDT) is one of the most comprehensive and well-researched frameworks in motivational psychology. Developed by Edward Deci and Richard Ryan at the University of Rochester beginning in the 1970s, SDT proposes that human beings have three innate psychological needs that, when satisfied, support optimal functioning and well-being.
The three needs are autonomy (the need to feel volitional and self-endorsed in one's actions), competence (the need to feel effective and capable in one's interactions with the environment), and relatedness (the need to feel connected, cared for, and belonging). SDT research shows that environments and relationships that support these three needs foster intrinsic motivation, psychological health, and personal growth, while those that thwart them lead to diminished motivation, well-being, and performance.
SDT also distinguishes between different types of motivation along a continuum from extrinsic to intrinsic. Intrinsic motivation, doing something because it is inherently interesting and enjoyable, represents the most autonomous and sustainable form of motivation. The theory has been applied across domains including education, healthcare, workplace management, sports, and psychotherapy.
Autonomy (feeling that your actions are self-chosen and meaningful), competence (feeling effective and capable of achieving desired outcomes), and relatedness (feeling connected to and cared for by others). SDT research shows these are universal needs across cultures, genders, and ages.
SDT suggests that personal development efforts are most sustainable when they satisfy autonomy (you choose your goals freely), competence (you experience progress and mastery), and relatedness (you feel supported by others). Programs that impose goals or ignore social connection are less likely to sustain motivation.
Intrinsic motivation comes from genuine interest and enjoyment in an activity. Extrinsic motivation comes from external outcomes such as rewards, approval, or avoidance of punishment. SDT research shows that intrinsic motivation leads to deeper engagement, creativity, and sustained effort.
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