Much of the facilitator's time is spent working with different types of group. These could include problem-solving groups, management teams and boards of directors and so there is a clear need to develop a good working knowledge of at least the basics of what has become known as group dynamics. The subject of what happens in groups that affects their performance is one of the most intensively researched in the whole field of social psychology and much is known about it. Groups that meet on a regular basis go through a number of well-defined stages of development. Various researchers have noted this, and it is indisputable. When a group first comes together, it is characterized on the personal relations front by a phase of dependency. As far as groups are concerned the problem with this approach is that it indicates that people are working as individuals rather than as a cohesive single entity.