Heidi Gerard Kaduson, PhD, RPT-S, specializes in evaluation and intervention services for children with a variety of behavioral, emotional, and learning problems. She is past president of the Association for Play Therapy and codirector of the Play Therapy Training Institute. She has lectured internationally on play therapy, attention-deficit/hyperactivity disorder, and learning disabilities. Dr. Kaduson's publications include The Playing Cure and 101 Favorite Play Therapy Techniques (Volumes I, II, and III). Dr. Kaduson maintains a private practice in child psychotherapy in Monroe Township, New Jersey.
 
Charles E. Schaefer, PhD, RPT-S, a nationally renowned child psychologist, is Professor of Psychology at Fairleigh Dickinson University in Teaneck, New Jersey. He is cofounder and director emeritus of the Association for Play Therapy, and founder and codirector of the Play Therapy Training Institute in Hightstown, New Jersey. He has written or edited more than 50 books on parenting, child psychology, and play therapy, including The Therapeutic Use of Child's Play, Foundations of Play Therapy, Handbook of Play Therapy, Play Therapy with Adolescents, and Empirically Based Play Interventions for Children. Most recently, he is coeditor (with Heidi Gerard Kaduson) of Contemporary Play Therapy: Theory, Research, and Practice. Dr. Schaefer maintains a private practice in child psychotherapy in Hackensack, New Jersey.