SDT stands for Self-Determination Theory, which is a psychological theory that explains how people's motivation and behavior are driven by innate psychological needs, such as autonomy, relatedness, and competence. Synonyms for SDT may include self-motivation theory, self-governance theory, or self-determination framework. These synonyms help convey the concept of personal agency, individual identity, and intrinsic motivation, which are all key components of SDT. SDT is widely used in education, healthcare, and other fields to understand how to promote positive behavior change and cultivate environments that support individuals' inherent needs for autonomy, connection, and growth.