KEVIN J. O'CONNOR, PHD, RPT-S, is a Clinical Psychologist and Distinguished Professor in Clinical PsyD and PhD programs at the California School of Professional Psychology. Along with Charles E. Schaefer, he cofounded the Association for Play.

CHARLES E. SCHAEFER, PHD, RPT-S, is Professor Emeritus of Psychology at Fairleigh Dickson University. Dr. Schaefer has written or edited over 55 professional books, many on the topic of play therapy.

LISA D. BRAVERMAN, PHD, is a pediatric psychologist who specializes in the areas of oncology, child abuse, and trauma. She also treats children, adolescents, and their families.