Group psychotherapy has emerged as an exceptionally efficient and cost-effective means of delivering mental health services. The use of action methods to activate and enhance dynamic interactions between members has been central to the origin and evolution of group therapy. This book is intended for use by counseling students or counseling professionals to expand their skills in the delivery of group psychotherapy. Based on the Interactive-Behavior Therapy model created by the author, this book provides information that helps group counselors and facilitators enact a group method that allows participants to experiment with interactive skills in a safe environment. It discusses research about how groups work and practical aspects of running effective groups. This book also provides examples, case studies, and analyses of actual group sessions. It describes how to use techniques effectively and offers practical ways for beginning and maintaining groups. Traditional concepts inherent in group work, such as the activation and enhancement of therapeutic factors, are defined and discussed in relation to using these methods. The adoption of action methods for individuals with chronic psychiatric disorders and people with developmental disabilities is discussed. Appendix A is a glossary; Appendix B is a list of resources. (Contains 4 figures, 43 references, and an index). (Author/MKA)