Experiences in groups are almost omnipresent when patients talk about family, school and social networks, friends and work colleagues. Group membership is central to many aspects of our lives. With this introduction to group therapy work, therapists who lead their first groups will find an integrating framework for their experiences in the clinic, for theoretical building blocks and for considerations from supervision. Individual therapists and counselors learn about the influence of groups on the experience and behavior of their patients and clients. Hermann Staats presents models, theories and research results for working with groups from a clinical and group analytical perspective.