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Ryan and Deci present self-determination theory as a broad account of motivation, personality development, and wellness organized through six related mini-theories. Its central claim is that people function and develop more fully when social conditions support three basic psychological needs: autonomy, the experience of acting with volition; competence, effectiveness in valued activity; and relatedness, mutual care and belonging.
Motivation varies in quality, not only quantity. External regulation can be internalized through introjected, identified, and integrated forms, while autonomy support promotes more durable engagement than control. The theory also distinguishes intrinsic motivation, goal contents, causality orientations, relationship processes, and vitality. Evidence spans education, work, health, sport, psychotherapy, digital environments, and culture.
Need support does not mean permissiveness or independence from others; structure, meaningful rationales, acknowledgement of feelings, and choice can coexist. The framework helps educators evaluate whether practices foster agency and competence or produce compliance by pressure.
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