Cheri L. Marmarosh is a licensed psychologist and Associate Professor of Professional Psychology at George Washington University, USA. She has published numerous empirical and theoretical articles that focus on how group and individual therapy facilitate change and is the author of Attachment in Group Psychotherapy (with Markin and Spiegel, 2013). She is an associate editor of Psychotherapy and a Fellow of the American Psychology Association, Division 29 (Psychotherapy) and Division 49 (Group Psychotherapy). She has a private practice in Washington, DC.