Dr. Sheila Marshall is an associate professor in the School of Social Work and associate faculty in the Division of Adolescent Health and Medicine at the University of British Columbia. She received her B.A.Sc. in Family Studies, MSc. and Ph.D. in Family Relations and Human Development from the University of Guelph. Her research focuses on adolescent development in the relational contexts of family and peers. Particular research interests include examining the ways adolescents actively engage in their own development during interactions with parents and peers, and how adolescents’ construction of their social identities contribute to social and emotional well-being. Her research has been funded by the Social Sciences and Humanities Research Council of Canada, Canadian Institutes for Health Research, and the Province of British Columbia. She is an associate editor with the Journal of Adolescence and on the editorial board of the Journal of Youth and Adolescence, and Adolescent Research Review.