本研究採個案研究法,從社會網絡的觀點,探討休閒餐廳中員工的人際網絡結構對團體效能的影響。研究採用網絡密度與群體中心性二項網絡指標,探討社會網絡和團體效能(集體自效、團體凝聚力與團體績效)間的關係。本研究針對某休閒連鎖餐廳的四家分店作跨個案比較發現,分店的員工內部網絡特性和團體效能確有關係存在,主要結論有三點:(1)分店的員工內部網絡密度和團體凝聚力間呈現正向直線關係的趨勢,此正向趨勢在工作諮詢網絡時特別明顯。至於網絡密度和集體自效、主觀團體績效二者間,雖未呈現明顯的正向直線關係,但高網絡密度分店的集體自效和主觀團體績效表現,明顯較低網絡密度者為佳,特別在工作諮詢網絡與情報網絡中;(2)員工內部網絡的群體中心性和主觀團體績效間有U型關係的趨勢,此關係模式出現在工作諮詢網絡與情報網絡,但群體中心性和團體凝聚力、集體自效二者間的關係則不明顯;(3)社會網絡和團體效能間的關係會因員工內部網絡關係的類型不同而有差異,工作相關網絡(如:工作諮詢與情報網絡)的影響較非工作相關網絡(如情誼網絡)明顯。
From the perspective of social network theory, this article explores the relationship between social relations and group effectiveness. The purpose of this article is to illuminate the causal chain of group effectiveness (collective efficacy, group cohesion and group performance) through network density and group centrality of social network. This article is a case study of a leisure and food chain-restaurant in Taiwan, which has 4 branches. Data were collected from questionnaire survey, interview and secondary sources. This study consisted of 79 employees from 4 branches. The data analyses revealed that: (1) the higher social network density of the employees is; the more intense group cohesion is. (2) The U-type relationship exists between group centrality of social network and subjective group performance, especially in work advice network and information network. (3)The types of network relations moderate the relationship between social network and group effectiveness.