TY - JOUR A1 - Gockel, Christine A1 - Kerr, Norbert L. A1 - Seok, Dong-Heon A1 - Harris, David W. T1 - Indispensability and group identification as sources of task motivation JF - Journal of Experimental Social Psychology N2 - Traditional Instrumentality × Value (I × V) models have attributed gains in performance groups to various conditions affecting the instrumentality of group members’ effort for a variety of valued outcomes. Social identity models have challenged this interpretation, suggesting that the instrumentality of effort may be irrelevant when group identification is high. A laboratory study is reported in which both indispensability and group identification are manipulated, and participants’ effort on a physical persistence task is assessed. Contrary to the social identity predictions but consistent with I × V predictions, the indispensability of effort had a positive effect on participants’ effort. Group identification had no direct or moderating effects on effort. KW - Group performance KW - Task motivation KW - Indispensability KW - Group identification Y1 - 2008 N1 - Volltext aus urheberrechtlichen Gründen nicht verfügbar. Fulltext due to copyright not available. VL - 44 IS - 5 SP - 1316 EP - 1321 ER -