Self-Determination Theory (SDT)

"To be self-determined is to endorse one's actions at the highest level of reflection.

When self-determined, people experience a sense of freedom to do what is interesting, personally important, and vitalizing."

Quote by Edward Deci & Richard Ryan,
Professors, Department of Clinical and Social Sciences in Psychology
University of Rochester

Source: http://www.psych.rochester.edu/SDT/index.php