Mark R. Dixon, PhD, is associate professor in the Behavior Anaylsis and Therapy Program at Southern Illinois University Carbondale.
Patrick M. Ghezzi, PhD, is associate professor of psychology (behavior analysis) and director of the Behavior Analysis Program and Early Childhood Autism Program at the University of Nevada, Reno.
Charles Lyons, PhD, is professor of psychology at Eastern Oregon University in Le Grande, OR.
Ginger Wilson, PhD, is clinical director of the Nyansa Learning Corporation in Tustin, CA.