Research paper
Ryan RM, Deci EL. Self-determination theory and the facilitation of intrinsic motivation, social development, and well-being. American Psychologist. 2000;55(1):68-78. doi:10.1037/0003-066X.55.1.68. PMID: 11392867.
Why we cite it
Landmark review article presenting self-determination theory (SDT) as a comprehensive framework for understanding human motivation, published as Ryan's APA Award Address. Integrates two SDT subtheories — cognitive evaluation theory (CET) on intrinsic motivation and organismic integration theory (OIT) on extrinsic motivation — into a unified account of the conditions that facilitate vs. undermine motivation, self-regulation, and well-being. Introduces the OIT taxonomy showing that extrinsic motivation is not monolithic but ranges from external regulation through introjection and identification to full integration with the self. Critically for this project, reviews health care evidence showing internalized motivation predicts weight loss maintenance, medication adherence, and glucose control. One of the most cited papers in psychology (~50,000+ citations). Referenced in companion 419 as the theoretical basis for understanding why motivation-dependent behavior is less stable than identity-aligned behavior.
DOI: 10.1037/0003-066X.55.1.68 · PubMed 11392867 · Publisher