The theory that people are motivated to grow and change based on innate psychological needs, and are capable of self-determination when their needs for autonomy, competence, autonomy, and connection to others are met. He is capable of self-determination when his needs for autonomy, competence, autonomy, and connection with others are met, which affects motivation and well-being.

The theory emphasizes the importance of intrinsic motivation for producing healthy adaptation and asserts that negative outcomes arise when people feel they are mainly driven by external forces and external rewards.