Who created Self-Determination Theory?

Edward Deci and Richard Ryan developed SDT starting in 1975, building on decades of research on intrinsic motivation.

Why is SDT important?

SDT explains how to foster genuine motivation rather than compliance, improving performance, wellbeing, and persistence across work, education, sports, and relationships.

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What Is Self-Determination Theory (SDT): Deci and Ryan Explained

Q: What is Self-Determination Theory?

SDT is a macro-theory of motivation by Deci and Ryan emphasizing three innate psychological needs: autonomy, competence, and relatedness.

Peter Kolomiets

|March 15, 2026|Updated Apr 13, 2026|8 min read

What Is Self-Determination Theory (SDT): Deci and Ryan Explained

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References

Deci, E. L., & Ryan, R. M. (1985). Intrinsic Motivation and Self-Determination in Human Behavior
Ryan, R. M., & Deci, E. L. (2000). Self-determination theory and the facilitation of intrinsic motivation, social development, and well-being
Ryan, R. M., & Deci, E. L. (2000). The What and Why of Goal Pursuits: Human Needs and the Self-Determination of Behavior

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Edward Deci and Richard Ryan: Founders of Self-Determination Theory

Learn the story of how Edward Deci and Richard Ryan revolutionized motivation psychology with their groundbreaking research starting in 1975.