The purpose of this study was to examine sequential mediating effects of self-determined motivation and moral disengagement in the relationship between athletes'' achievement goal orientation and social behavior(pro-social behavior and antisocial behavior). Furthermore, we tried to verify whether this mediating effect can be conditionally moderated according to the coaching style, which is a social environment variable. Participants in study 1 were 255 high school, university and professional Taekwondo athletes who 2018 participated in the Peace Taekwondo Championships and the national finalists. They responded to achievement goal orientation, self-determined motivation, moral disengagement, prosocial behavior, and antisocial behavior measures. Multiple mediation effects were analyzed using the SPSS PROCESS Macro program. As a result, autonomous motivation had a significant positive indirect effect in the relationship
between task goal orientation and prosocial behavior, but there was no indirect effect of moral disengagement. In addition, the relationship between ego goal orientation and antisocial behavior showed a significant positive indirect effect of controlled motivation and moral disengagement. Specifically, task goal orientation not only directly effects prosocial behavior, but also indirect effects through autonomous motivation, but ego goal orientation had no direct effect on antisocial behavior. However, it has been shown to have a significant indirect effect on antisocial behavior through controlled motivation and moral disengagement. Study 2 was conducted on 268 high school, college and professional athletes who 2018 participated in the presidential Taekwondo competition. They completed achievement goal orientation, moral disengagement, coaching style, prosocial behavior, and antisocial behavior measures. The moderated mediating effects of coaching types were analyzed using the SPSS PROCESS Macro program. As a result, mediating effects of task goal orientation, moral disengagement, and prosocial behavior were found to be moderated through controlled coaching, although the mediating effect of autonomous support coaching was not significant. In addition, the mediating effects of self-goal orientation, moral disengagement, and antisocial behavior were moderated by autonomous support coaching, but the moderating effect of control coaching was not significant. In conclusion, this study contributed to demonstrating moral behavior predictors by deriving meaningful mediating effects in the relationship between achievement goal orientation, self-determined motivation, moral disengagement, prosocial behavior, and antisocial behavior. Furthermore, it is evaluated that the literature of the moral behavior was extended by analyzing meaningful results that moral disengagement and moral behavior can be moderated by the social environment variables such as coaching style.
Key words: achievement goal orientation, autonomous motivation, controlled motivation, moral disengagement, coaching style, prosocial behavior, antisocial behavior