本研究主要目的為：探討後衛、前鋒、中鋒3位置球員之主力與非主力球員和3位置間彼此攻守紀錄表現之差異情形。研究是以2007-2008年，美國NCAA大學籃球賽最後進入8強大學隊伍的攻守紀錄為研究對象。所得資料以平均數差異考驗、單因子變異數分析和雪費法事後比較等方法進行統計分析。所得結果如下：後衛球員主力與非主力球員中，3分球投籃的命中率，並無任何顯著差異，而在其他的攻守紀錄表現上，主力球員皆有明顯較多的表現。前鋒主力與非主力球員的2分和3分球命中率皆則未有何差異，其餘各項攻守紀錄，主力球員皆顯著高於非主力球員。中鋒的攻守紀錄結果顯示，上場場數、助攻數和投籃命中率方面皆未有所不同，其餘攻守結果，主力球員明顯高於非主力球員的不同表現。在3位置球員的比較方面：後衛在助攻和3分命中率上明顯較前鋒和中鋒表現為好，且後衛也有明顯較中鋒為多的抄截表現。而前鋒和中鋒，結果顯示其2分命中率和阻攻皆較後衛表現為好，而前鋒犯規有比後衛為多的現象。在競爭激烈的籃球比賽裡，不管是擔任何種位置的球員，都有其專司的主要行為表現。
The main purpose of this study is to: investigate the statistics and the performances of guards, forwards, and centers and relationships between the bench players and main players. The statistics of the Top 8 teams of NCAA college basketball 2007-2008 are used as the main research material. Statistical analysis is calculated from the collected data compared between average difference testing, one-way ANOVA analysis and Scheffe method. The results are as follows: There is no difference in the three-point shooting percentage between key guards and bench guards, but there is a higher percentage in performances on the main guards. There is no difference in two point and three point field goal percentage between key forwards and bench forwards, but key forwards shows a higher percentage in other performances. Center's statistics shows that there are no differences in assists, field goal percentage, and matches attend between key centers and bench centers, but key centers show a high percentage in other criteria of performances. When comparing the three positions: Guards shows better performance in assists compared to forwards and centers, and guards have more steals than centers. Forwards and centers have better performances in rebounds and field goal percentage, but forwards have more personal fouls than guards. In highly competitive basketball games where no matter what kind of position a player may be, everyone shows performance in the criteria they are involved in.
