Tammy Chung (PhD, Rutgers University) is a Professor of Psychiatry and Director of the Center for Population Behavioral Health at the Institute for Health, Health Care Policy and Aging Research. A long-standing focus of her research involves understanding how differential exposure to social determinants of health across the lifespan shapes health disparities, as in work done with the Pittsburgh Girls Study, a large longitudinal community sample of women followed from childhood to young adulthood. Current projects evaluate the use of mobile technology, including Ecological Momentary Assessment, smartphone sensors (e.g., GPS-derived travel patterns), and wearable devices to advance substance use assessment and to support personalized, real-time substance use intervention when and where it is most needed.