Self-Determination Theory: Basic Psychological Needs in Motivation, Development, and WellnessSelf determination theory (SDT) provides a framework for understanding the factors that promote motivation and healthy psychological and behavioral functioning. In this authoritative work, the codevelopers of the theory comprehensively examine SDT's conceptual underpinnings (including its six mini theories), empirical evidence base, and practical applications across the lifespan. The volume synthesizes a vast body of research on how supporting or