Anthony D. Pellegrini, PhD, is Professor of Psychological Foundations of Education in the Department of Educational Psychology at the University of Minnesota, Twin Cities. His primary interest is in the development of play and dominance. He also has research interests in methodological issues in the general area of human development, with specific interest in direct observations. His research has been funded by the National Institutes of Health, the Spencer Foundation, and the W. T. Grant Foundation. Dr. Pellegrini is a Fellow of the American Psychological Association and has been awarded a Fe...