Abstract
This article examines the principles and practice of transactional analysis process group work and five key areas for analyzing the development of the group. It is based on Eric Berne’s (1966) original work on group structure and dynamics in Principles of Group Treatment and integrates the work of Minuchin (1974) and Joines (1988) on intrapersonal and interpersonal boundaries. The boundaries of five areas or aspects of the group determine its formation and development and manifest the significance of leadership, group interaction, and group process. Seven key principles in process group work are presented. These provide the foundation for process group work practice and are relevant for all areas and stages of groups.