We investigated 2 engagement-fostering aspects of teachers' instructional styles-autonomy support and structure-and hypothesized that students' engagement would be highest when teachers provided high levels of both. Trained observers rated teachers' instructional styles and students' behavioral engagement in 133 public high school classrooms in the Midwest, and 1,584 students in Grades 9 -11 reported their subjective engagement. Correlational and hierarchical linear modeling analyses showed 3 results: (a) Autonomy support and structure were positively correlated, (b) autonomy support and structure both predicted students' behavioral engagement, and (c) only autonomy support was a unique predictor of students' self-reported engagement. We discuss, first, how these findings help illuminate the relations between autonomy support and structure as 2 complementary, rather than antagonistic or curvilinear, engagement-fostering aspects of teachers' instructional styles and, second, the somewhat different results obtained for the behavioral versus self-report measures of students' classroom engagement.

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Teachers with an autonomy-supportive style rely on different instructional behaviors to motivate their students than do teachers with a controlling style. In the present investigation, the authors tested which of these instructional behaviors actually correlated positively or negatively with students' autonomy. The authors used Deci, Spiegel, Ryan, Koestner, & Kauffman's (1982) teacher-student laboratory paradigm to randomly assign 72 pairs of same-sex preservice teachers into the role of either teacher or student. From videotapes of the 10-min instructional episode, raters scored 11 hypothesized autonomy-supportive behaviors and 10 hypothesized controlling behaviors. Correlational analyses confirmed that students perceived the functional significance of 8 instructional behaviors as autonomy supports and 6 instructional behaviors as autonomy thwarts. The discussion focuses on the interpretation and classroom implications of these data.

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Recognizing recent criticisms concerning the cross-cultural generalizability of self-determination theory (SDT), the authors tested the SDT view that high school students in collectivistically oriented South Korea benefit from classroom experiences of autonomy support and psychological need satisfaction. In Study 1, experiences of autonomy, competence, and relatedness underlaid Korean students' most satisfying learning experiences, and experiences of low autonomy and low competence underlaid their least satisfying learning experiences. In Study 2, psychological need satisfaction experiences were associated with productive (achievement and engagement) and satisfying (intrinsic motivation and proneness to negative affect) student outcomes. Study 3 replicated and extended Study 2's structural equation modeling findings by showing that the hypothesized model explained students' positive outcomes even after controlling for cultural and parental influences, including the collectivistic value orientation. Study 4 replicated the earlier cross-sectional findings with a semester-long prospective 3-wave design. The authors discuss how the findings support the motivation theory's cross-cultural generalizability.