Beatrice Beebe is a psychologist, psychoanalyst, mother-infant therapist and researcher in mother-infant communication at the New York State Psychiatric Institute at Columbia University, USA. She teaches at several psychoanalytic institutes in New York City, including the NYU Postdoctoral Program in Psychotherapy and Psychoanalysis, the Institute for the Study of Intersubjectivity, and the Columbia Psychoanalytic Center. She also teaches at the Columbia Parent-Infant Program, and the Anni Bergman Parent Infant Training Program. She is the author of Forms of Intersubjectivity in Infant Research and Adult Treatment (2005, with Knoblauch, Rustin and Sorter); Infant Research and Adult Treatment… (2002, with Lachmann); and Rhythms of Dialogue in Infancy (2001, with Jaffe, Feldstein, Crown and Jasnow).Phyllis Cohen is a psychologist, psychoanalyst, child and adolescent therapist, and couples therapist. She teaches child, adolescent and couples therapy at several psychoanalytic institutes and at New York University, USA. She is the founder and Director of the New York Institute for Psychotherapy Training in Infancy, Childhood and Adolescence (NYIPT), where she teaches and supervises, and is also on the Executive Committee of the Project in Family Systems and Psychoanalysis at NYU Postdoctoral Program in Psychoanalysis and Psychotherapy. She has published many papers on infant, child, adolescent and family therapy.K. Mark Sossin is Professor of Psychology at the Dyson College of Arts and Sciences, New York University, USA. His ongoing research focuses on infant-parent interaction, transmission of stress, autism, nonverbal/movement behavior, and early childhood affective development. Publications include History and future of the Kestenberg Movement Profile , in S. C. Koch & S. Bender (Eds.), Movement analysis: Bewegungsanalyse (2007) and Nonmentalizing states in early-childhood survivors of the Holocaust: Developmental considerations regarding treatement of child survivors of genocidal atrocities in the American Journal of Psychoanalysis , 67(1), 68-81 (2007).Sara Markese is a clinical psychologist specializing in the treatment of trauma in early childhood. She is a Postdoctoral Fellow and research collaborator in the Department of Child and Adolescent Psychiatry at the New York State Psychiatric Institute, at Columbia University, USA. She has published on the treatment of early childhood trauma, and is co-author with Dr. Beebe on six research articles.