She received her Ph.D. from Rutgers University. Since coming to Penn in 1998, she has been an investigator, clinical trainer, and therapist in studies of innovative applications of Cognitive Behavior Therapy and Motivational Interviewing in addiction treatment. She has collaborated in the development of clinical protocols for several of the Center’s telephone continuing care studies and is co-author of the book Telephone Continuing Care for Adults published by Hazelden in 2010. A member of the Motivational Interviewing Network of Trainers, Dr. Van Horn consults nationally on implementing MI and CBT in community-based addiction treatment and general health care settings.