The Self-Determination Theory of Motivation looks at different types of motivation, from not being motivated at all to being motivated by internal desires. It suggests that intrinsic motivation, driven by personal satisfaction, is the best kind. However, the theory also says that external motivation can be helpful, depending on how it's used. The author of the review argues that both intrinsic and extrinsic motivation should be considered. They discuss the evidence for and against the theory, its limitations, and areas for future research.