The progress of a group under intended dynamic direction was recorded over a period of 65 hours on the basis of interaction frequencies and directions as well as interaction contents and styles. It could be demonstrated that by means of this relatively simple or global approach an adequate and sufficiently sensitive picture of the therapist/patient activities and their phase-specific change could be reflected. On the basis of an example of a cohesive group, the change in significance of the therapist postulated in our conception and the interaction process between group, therapist and patient could be confirmed. The data obtained for the individual hours have been condensed for a demonstration of the phase-typical course.