Determination is a positive emotional feeling that promotes persevering towards a difficult goal in spite of obstacles. Determination occurs prior to goal attainment and serves to motivate behavior that will help achieve one's goal. Empirical research suggests that people consider determination to be an emotion; in other words, determination is not just a cognitive state, but an affective state. In the psychology literature, researchers study determination under other terms, including challenge and anticipatory enthusiasm; this may explain one reason for the relative lack of research on determination compared to other positive emotions. In the field of psychology, emotion research focuses on negative emotions and the behaviors they prompt. However, positive psychology delves into determination as a positive emotion driving people toward action, leading to significant results like persistence and success. The word determination comes from the Latin word dēterminatiō, meaning "limit" or "determination, end result". It is derived from the verb dētermināre, meaning "confine; designate," with the abstract noun suffix -tiō. The meaning shifted from "end result, decision" to its present meaning. Self-determination theory (SDT) is a theory of motivation and dedication towards an ambition. It focuses on the interplay between personalities and experiences in social contexts that results in motivations of both autonomous and controlled types. An example of autonomous motivation would be doing something because of intrinsic motivation, or because there is an internal desire to accomplish something. An example of controlled motivation would be doing something because there is outside pressure to accomplish a goal. Social environments seem to have a profound effect on both intrinsic and extrinsic motivation and self-regulation. Self-determination theory proposes that social and cultural factors influence a person's sense of volition and initiative in regards to goals, performance, and well-being.