Studied relationships between adolescents' perceptions of their middle school (school goal structures, autonomy provisions, positive teacher regard) and changes in academic motivation, achievement, and psychological adjustment. Found perceptions to be important predictors; for example, perception of positive teacher regard and an emphasis on…

Examined factors that influence adolescents' commitments to extracurricular activities over time. Found that psychological factors of perceived competence and peer relationships, as well as contextual factors of perceived challenge, cost, benefits, and emerging identity, were decisive in adolescents' choice to remain involved in activities or…

Data from a longitudinal study of adolescent development of approximately 2,300 sixth and seventh graders (the Michigan Study of Adolescent Life Transitions) provide a basis for the hypothesis that optimal developmental outcomes should result from an environment that gradually reduces adult control as the child's desire for autonomy increases.…

Explores the hypothesis that declines in achievement demonstrated in early adolescence result from educational context through a review of studies and analyses using National Education Longitudinal Study data (sample of 24,599 eighth graders). Evidence of a mismatch between school environment and student needs is discussed. (SLD)