Joanna Lee Williams, PhD, is an associate professor in the Graduate School of Applied and Professional Psychology at Rutgers University. She also holds an appointment as associate professor in the School of Education and Human Development at the University of Virginia. As a developmental psychologist her primary interest is the period of adolescence. Her scholarship focuses on understanding the role of race and ethnicity in individual and interpersonal contexts and at broader levels of the ecology (e.g., classrooms). This includes research on racial/ethnic identity, racial/ethnic diversity in adolescent friendship networks, and social network equity in diverse middle school classrooms. Dr. Williams is also involved in efforts to translate the science of adolescent development into useful recommendations and practices for parents, educators, and policymakers. Dr. Williams is a member of the National Academies of Science, Engineering, and Medicine’s Committee (NASEM) on Neurobiological and Socio-behavioral Science of Adolescent Development and its Applications, the NASEM Board of Children, Youth, and Families, and the National Scientific Council on Adolescence. She is also a faculty affiliate of Youth-Nex: The UVA Center to Promote Effective Youth Development, and the Center for Parent and Teen Communication, a multidisciplinary team based within the Division of Adolescent Medicine at Children's Hospital of Philadelphia.