Catherine L. Bagwell, PhD, is Associate Professor in the Department of Psychology at the University of Richmond in Virginia. Her primary research interests are peer relationships in childhood and adolescence and the developmental significance of friendship. She is investigating the importance of having friends, friendship quality, and the characteristics of friends. Dr. Bagwell's interest in the peer relations of children with disruptive behavior disorders led to her second area of research, on attention-deficit/hyperactivity disorder and the social and emotional correlates and outcomes that are associated with this disorder.

Michelle E. Schmidt, PhD, is Associate Professor and Chair of the Department of Psychology at Moravian College in Bethlehem, Pennsylvania. She also serves as Director of Academic Leadership Programs. Her primary research interests include friendship, peer relationships, and peer victimization. Along with Dr. Bagwell, she is investigating the importance of having friends, friendship quality, and the characteristics of friends. Dr. Schmidt is also involved in two large studies of peer victimization—one in a group of high-risk public schools and the other in an independent school—studying children and adolescents from prekindergarten through the high school years.