Lydia A. Shrier, M.D., M.P.H. is a Senior Associate in Medicine with the Division of Adolescent/Young Adult Medicine of Boston Children's Hospital and an Associate Professor of Pediatrics at Harvard Medical School. She is board-certified in Adolescent Medicine, having completed a fellowship at Boston Children's Hospital in 1996. She received her Master's degree in Public Health from the Harvard School of Public Health in 1997. Dr. Shrier developed the Safer Sex Intervention and conducted the original randomized controlled trial demonstrating its efficacy in reducing sexual risk behavior among high-risk female adolescents and young adults. She currently leads a program of adolescent health research using electronic devices for frequent momentary assessment of and intervention on emotional states, social contexts, and risk behaviors in vivo. As the Director of Clinic-based Research for the Division of Adolescent/Young Adult Medicine at Children's Hospital Boston, Dr. Shrier oversees a Clinical Research Coordinator and choreographs the conduct of numerous clinical studies. She also maintains a practice in primary and specialty adolescent care.