Richard M. Lerner, Ph.D. is Bergstrom Chair in Applied Developmental Science at the Eliot-Pearson Department of Child Development at Tufts University. He is the author or editor of many publications, including the Handbook of Psychology, Volume 6, Developmental Psychology, and Pathways to Positive Development about Diverse Youth. New Directions for Youth Development: Theory, Practice, and Research (Jossey-Bass). Dr. Lerner is also a past editor of the Journal of Research on Adolescence.

Laurence Steinberg, Ph.D. is Laura H. Carnell Professor of Psychology at Temple University.  He is currently Director of the John D. and Catherine T. MacArthur Foundatio n Research Network on Adolescent Development and Juvenile Justice. He is Past-President of the Society for Research on Adolescence and is the author or editor of numerous books, including Adolescence, Sixth Edition.