目的：本研究在探討高中職甲組排球選手的背景變項、知覺教練權力類型和團隊凝聚力對運動表現的影響。方法：以345 位參加2008 年全國高中排球聯賽甲組選手為研究對象（男性225 位，女性120 位），所有的選手皆填寫背景變項及改編的高中職排球教練權力類型問卷和團隊凝聚力問卷。結果：經多元逐步迴歸分析，本研究發現訓練天數、年級和球齡皆能預測運動表現，解釋變異量為27.60 %；此外，利酬型教練權利類型亦能預測其運動表現，解釋變異量為25.70 %。結論：依據結果，本研究認為增加選手參與訓練的頻率和時間就會促進運動表現。當教練還能提供外在資源的獎賞，不僅會促進選手參與訓練的動機，也會提升運動表現。

Purpose: This study explores the effects of demographic variables, perception of coaching authority style, and group cohesion on sports performance among high school volleyball players at the level of Division I in Taiwan. Method: Participants included 345 volleyball players (225 boys and 120 girls) who participated in the 2008 National High School Volleyball league match at the level of Division I. All were asked to complete demographic variables of athletes, Revised Questionnaire of High School Coaching Authority Type and Group Cohesion Questionnaire, Results: using multiple stepwise regression, weekly training frequency, grade in school, and training year are shown to be predictors of sports performance, with variance accounting for 27.60%. In addition, remunerative coaching style is a predictor of sports performance, with variance accounting for 25.70%. Conclusion: According to these results, the increment of weekly training frequency and duration facilitates sports performance. When coaches provide rewards for athletes, not only their motivation to participate in training but also their sports performance will be improved.