Garland, Jones, and Kolodny made a major contribution to the theory and practice of social work with groups with their publication, A Model for Stages of Development in Social Work Groups (1965). Garland et al.’s model, also known as the “Boston Model” emerged from the authors’ direct observations and analyses of process recordings of numerous children’s groups conducted in a traditional social service agency. Garland et al. proposed a five-stage model: pre-affiliation, power and control, intimacy, differentiation, and termination.