[The large group in the therapeutic community with special reference to the comparison of small open and closed groups].

It is reported on the experiment to describe group-dynamic processes in the macrogroup, taking into particular consideration the comparison of open and closed microgroups. The examination of 76 sessions of macrogroups in a psychotherapeutic inpatient institution with 2 open and 2 closed microgroups has the following results: 1. The prevalence of the open groups in activity; 2. a correlative dependence of the alpha- and beta-position as group function 3. a two-phase development of the closed groups in the macrogroup.