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Gottfried, A. E. (in press) Motivation (Intrinsic, Extrinsic). In M. Bornstein, Ed.The SAGE Encyclopedia of Lifespan Human Development. Thousand Oaks, CA: SAGE Publications
This chapter presents an overview of intrinsic vs. extrinsic motivation, developmental trends of such motivation across childhood through adulthood, and relationships to academic success. The role of environment is presented with implications for practice.