3Ancona, Deborah G., and David F. Caldwell . Bridging the boundary: External activity and performance in organizational teams [J]. Administrative Science Quarterly, 1992, 37: 634-665.
4Evans, C. R., & Dion, K. L. Group cohesion and performance: a meta- analysis [J]. Small Group Research, 1991, 22(2): 175 - 186.
5Gully, S. M., Devine, D. J., & Whitney, D. J. A metaanalysis of cohesion and performance: effects of levels of analysis and task interdependence [J]. Small Group Research, 1995, 26(4): 497 - 520.
6Mullen, B., & Cooper, C. The relation between group cohesiveness and performance: an integation [J]. Psychological Bulletin,1994, 115 (2): 210- 227.
7Shaw, M. E. Group dynamics [ M ]. McGraw - Hill Publisher.1981.
8Harrison, D. A., Price, K. H., & Bell, M. P. Beyond relational demography: time and the effects of surface- and deep -level diversity on work group cohesion [ J]. Academy of Management Journal, 1998, 41 (1): 96 - 107.
9Lott, A.J. and Lott, B.E. Group cohesiveness, communication level, and conformity [J]. Journal of Abnormal and Social Psychology, 1961, 62: 408-412.
10Smith, K. G., Smith, K. A., Olian, J. D., Sims, H. P.,O' Bannon, D. P., & Scully, J. A. Top management team demography and process: the role of social integration and communication [J]. Administrative Science Quarterly, 1994, 39(3): 412-438.
4Morrison E W ’ Robinson SL. When employees feel betrayed : A model of how psychological contract violation develops[J ]. Acad-emy of Management Review,1997,22 : 226-256.
5R ohinson S L,Morrison E W. The development of psychological contract breach and violation : a longitudinal study[J ] . Journalof Organizational Behavior, 2000, ( 21) : 543.
