本研究之主要目的在於探討群體支援系統環境中層級分析法與任務型態對群體決策之影響。以實驗室研究的方式進行，採用二因子完全隨機設計，自變數為群體支援系統（是否具備分析層級程序法之功能）及任務形態（智力型決策與偏好型決策）。實驗所使用的群體支援系統為自行開發；決策任務則分別取材自國際交換學生計畫與個人信託基金分配。一共有180位樣本參與實驗，其中有20人參加四組先導實驗，其他160人分為三十二組參加正式實驗，每組人數為5人。應變數之評估則包括共識改變度、認知決策品質、決策滿意度、決策過程滿意度、及認知決策信心。研究結果顯示在具備分析層級程序法的群體支援系統中，偏好型決策較智力型決策有較佳的共識改變度與決策品質；在偏好型決策中，具備分析層級程序法的群體支援系統有較佳的共識改變度與決策品質；但是在智力型決策中，兩個群體支援系統類型對群體決策輔助的效果則無顯著的差異。

　　The purpose of this study is to investigate the impacts of AHP and task types on group decision making in GSS environment. A two-by-two completely randomized factorial design was employed, and a total of 180 subjects participated in the study. Four pilot experimental sessions and thirty-two sessions were conducted. There was five subjects in each session. The independent variables manipulated were GSS (using AHP versus not) and decision task (preferential task and intellective task). The dependent variables were change of consensus, perceived decision quality, decision scheme satisfaction, decision satisfaction and decision confidence. The results indicate that using AHP in GSS can make the meeting more effective outcomes on the preferential task. In the manner of intellective, the result is whether or not using AHP in GSS are no difference on decision making. However when confronting preferential task, using AHP in GSS can make the meeting more effective outcome than no using AHP in GSS.