Kenneth A. Kavale is professor of Special Education at Regent University in Virginia Beach, Virginia. He has held faculty positions at the universities of Georgia, Colorado, California-Riverside, and Iowa. Mark P. Mostert is professor of Special Education at Regent University in Virginia Beach, Virginia. Mark has served as a classroom teacher and administrator in general and special education. His current research interests include validity aspects of research synthesis, empirical research bases for effective classroom practices, and societal perceptions of disability.