ABSTRACT
One important aspect of the social organization of groups which endure over any considerable time is the fact that usually roles within the organization are differentiated from each other. The members of the organization possess a common culture, part of which consists of the expectations they have developed as to how each person will behave. When roles are differentiated, overt acts of certain qualities are expected of certain persons at certain times, while overt acts of other qualities are expected of other persons at other times. Furthermore, there is some permanence in the expectations which apply over extended time periods.
