目的：本研究旨在透過兩組獨立樣本，以探索性和驗證性因素分析檢定自主性功能指數量表 (Weinstein, Przybylski, & Ryan, 2012) 之因素效度。方法：本研究共徵募516名高中運動員為研究對象，採用探索性和驗證性因素分析以及同時多群組共變數分析資料。結果：發現自主性功能指數量表除具有良好之因素效度外，亦證實量表在男女運動員之間具有測量恆等性。結論：自主性功能指數量表是一份具有心理計量品質的問卷，適用於測量臺灣地區運動員的自主性功能之情形。

Purpose: This study aimed to verify index of autonomous functioning, IAF (Weinstein, Przybylski, & Ryan, 2012) via two independent samples using exploratory and confirmatory factor analyses. Methods: Five hundred and sixteen senior middle school athletes (Mage = 16.53) were recruited. Main analyses were exploratory factor analysis, confirmatory factor analysis and simultaneous multigroup covariance analyses. Results: The factorial validity of IAF was demonstrated as good and the invariance between male and female athletes was also substantiated in this scale. Conclusion: According to these results, IAF had a good psychometric property and was suitable to measure athletes’ autonomous functioning in Taiwan.