Dr. Hagan earned an MPH in Epidemiology from Boston University School of Public Health and a PhD in Clinical Psychology from Arizona State University. She completed a two-year postdoctoral fellowship at the University of California, San Francisco Child Trauma Research Program in the Department of Psychiatry. Her research focuses on the effects of interpersonal stress and trauma on mental and physical health at different developmental stages and the design and testing of interventions to mitigate the negative effects of childhood adversity.