Cheri L. Marmarosh, PhD, is a full-time associate professor of professional psychology at the George Washington University and a licensed psychologist. She has published numerous empirical and theoretical articles that focus on how group and individual therapy facilitate change and is the lead author of two books- Attachment in Group Psychotherapy and Group: Facilitating a Culture of Change. She is an associate editor of Psychotherapy and on the editorial boards of Group Dynamics: Theory, Research, and Practice and the International Journal of Group Psychotherapy. Dr. Marmarosh is a Fellow of the American Psychology Association, Division 29 (Psychotherapy) and Division 49 (Group Psychotherapy). She has a private practice in Washington, DC.