[Experiences of Psychologists and Sport Therapists Conducting Open and Closed Therapy Groups].

Few studies compare differences between open and closed therapy groups. Different characteristics of both formats, which have been theoretically and practically substantiated to date, are presumably responsible for different therapeutically relevant effects. The present analysis documents and analyzes therapists' experiences with both open and closed group formats and provides information relevant to the selection of group format. To this end, psychologists and sport therapists in a department for behavioral orthopedic rehabilitation were asked in open, guided interviews about their experiences during a changeover from closed to open groups. Their responses were analyzed using qualitative content analysis. Characteristics of open and closed groups identified in the literature were largely confirmed, but differences not yet identified in the literature were also discovered. These relate to everyday therapeutic practice and therapist motivation. Additionally, similarities and differences between sport and psychotherapy groups are highlighted. In sum, closed groups are characterized by high group cohesion and deeper relationships in the course of therapy. Closed group sessions can build on each other and are structured. Open groups have a consistent level of energy and stronger dynamics over time and offer a wide range of contact opportunities. Different patient roles in group therapy must be kept in mind in both formats. Both group forms have characteristics that can be used for different therapeutic goals and indications and are therefore justified in a therapeutic context. These empirical findings suggest that therapists can strategically choose a specific group form for the support of specific types of patients or for reaching specific therapy goals.