Richard M. Lerner is the Bergstrom Chair in Applied Developmental Science and the Director of the Institute for Applied Research in Youth Development in the Eliot Pearson Department of Child Study and Human Development at Tufts University.

Gary Greenberg is Professor Emeritus of Psychology at Wichita State University and Co-founder (with Ethel Tobach) of the International Society for Comparative Psychology; he has been a comparative psychologist for his entire career.