So cohesiveness, role differentiation and a common commitment are the signs of a good group. If that sounds a bit sociological to you—and it does strike me as a bit heavy on the jargon—try it from the human point of view. If people are close, know where they fit in and see the group’s purpose in the same way, the group is likely a winner. Before we can say for sure, however, we need to check out the special requirements of task, relationship and influence groups. We’ll take them in that order in