This document discusses group therapy, outlining its definition, functions, types, selection criteria, physical considerations, size, membership, the therapist's role, approaches, therapeutic factors, and techniques. Group therapy is a form of psychosocial treatment where clients meet together with a therapist to share experiences, gain insight, and improve interpersonal skills. It serves important functions like socialization, support, task completion, and empowerment. The document provides guidance on setting up effective group therapy sessions.