Mary C. Zanarini, EdD, is Professor of Psychology at Harvard Medical School and Director of McLean Hospital's Laboratory for the Study of Adult Development. She has spent her career studying the phenomenology and long-term course of borderline personality disorder (BPD), childhood experiences of adversity, and co-occurring disorders. She has also conducted a series of medication trials and trials of psychosocial treatments for BPD, and she developed the most widely used diagnostic and severity measures for BPD. Dr. Zanarini is the founding President of the North American Society for the Study of Personality Disorders and a past Vice President of the International Society for the Study of Personality Disorders.