SDA Theory, or Self-Determination Theory, is a psychological framework that focuses on human motivation and personality. It emphasizes the importance of three basic psychological needs: autonomy, competence, and relatedness. When these needs are satisfied, individuals are more likely to experience intrinsic motivation, leading to greater engagement and well-being. The theory suggests that environments supporting these needs foster optimal functioning and personal growth. In contrast, environments that thwart these needs can lead to negative outcomes, such as decreased motivation and well-being. Overall, SDA Theory highlights the significance of nurturing these fundamental needs for healthy development.