The second stage occurs when individuals want to test the group norms and roles, and perhaps reestablish some of them. As this testing is accomplished, the process issues are integrated into the group members' behaviors in the third stage of development. Finally, a group matures into an efficient and effective work group that is capable of solving problems and making decisions well. We study the behavior of people in groups by determining the group characteristics which cause group performance to vary. An obvious group characteristic is size.
More people offer additional judgement and expertise, but also compete for time interacting.
Groups tasks vary, sometimes being routine in nature, sometimes unique. The desired results of group effort may be well understood and agreed upon by group members, but they may not. These two dimensions of group tasks, certainty about means and ends, are the primary ways in which group tasks can be differentiated. The behavior of people in groups must address two issues. First the task at hand will require certain activities by the group members in order to complete it.