Xinyin Chen received his Ph.D. from University of Waterloo in 1992. He is currently a Professor in the Department of Psychology at the University of Western Ontario. He has received a William T. Grant Scholars Award and several other academic awards. In collaborating with his international colleagues, he has been conducting several large-scale, cross-cultural longitudinal projects in Canada, China and other countries. He is a member of the American Psychological Association (APA), International Society for the Study of Behavioral Development (ISSBD), and the Society for Research in Child Development (SRCD). He has published a number of book chapters and articles concerning culture, children's social behaviors and peer relationships, and parental socialization practices. His work has been published in major developmental journals such as Child Development, Developmental Psychology, Merrill-Palmer Quarterly and International Journal of Behavioral Development. Doran C. French is a Professor and Department Chair of Psychology at Illinois Wesleyan University. He received his Ph.D. from the University of Minnesota in 1980. He has published articles and book chapters on various aspects of children's peer relationships including cross-age interaction, sociometric status, developmental psychopathology, school adjustment, aggression, and friendship. His research on culture and peer relationship dates from the time of his Fulbright fellowship in Indonesia. Since that time, he has collaborated with colleagues in Indonesia and S. Korea to study social status, aggression, conflict and friendship, work that has been published in Child Development, Social Development, Merrill-Palmer Quarterly, and the Minnesota Symposium on Child Psychology. Barry H. Schneider is Professor of Psychology and Vice-Dean of Research (Social Sciences) at the University of Ottawa, Canada, where he has taught since 1981. Since that time, he has received several professional awards, including Professor of the Year, Bea Wickett Award for an outstanding contribution to mental health in education, and fellow status with the Canadian Psychological Association. In addition to his research in Canada, he has worked in Costa Rica, Cuba, France, Hungary, and Italy. Dr Schneider is the author of three books, Friends and Enemies: Peer Relations in Childhood (London, Arnold, 2000); Children's Social Competence in Context: The Contributions of Families, Schools, and Cultures (Oxford, Pergamon, 1993); and The Gifted Child in Social Context (New York: Springer-Verlag, 1987). He is also the senior editor of two edited volumes in peer relations: Social Competence in Developmental Perspective (with Attili, Nadel & Weissberg; Dordrecht, NL: Kluwer, 1989) and Children's Peer Relations: Issues in Asssessment and Intervention (with Rubin & Ledingham, New York: Springer Verlag, 1985.