Objectives: Grounded in self-determination theory, we implemented an autonomy-supportive intervention program (ASIP) to help physical education (PE) teachers become more autonomy-supportive and less controlling toward their students. We tested whether such changes in teachers' classroom motivating styles could promote students' prosocial behaviors and diminish their antisocial behaviors.
Design:We used an experimental research design to manipulate teachers' motivating style and a three-wave longitudinal design to assess the student-reported dependent measures.
Method:We randomly assigned PE teachers (8 women, 25 men; 15 middle, 18 high school)to participate or not in the ASIP. At mid-semester, classroom observers rated teachers' autonomy-supportive and controlling instructional behaviors. At the end of the semester, teachers rated their students' prosocial and antisocial behaviors. At the beginning, middle, and end of the semester, the 1,824 students of these teachers completed measures of need satisfaction, need frustration, prosocial behavior, and antisocial behavior.Results: ASIP participation increased teachers' autonomy support, students' need satisfaction, and students' prosocial behavior, and it decreased teachers' control, students' need frustration, and students' antisocial behavior. Multilevel structural equation modeling showed that these intervention-enabled increases in students' need satisfaction longitudinally increased their prosocial behavior, while intervention-enabled decreases in students' need frustration longitudinally decreased their antisocial behavior and acceptance of cheating.Conclusion: ASIP-enabled student benefits extend beyond previously-documented personal adjustment gains (e.g., engagement, learning) to include social adjustment gains as well.