Ruth Duskin Feldman is an award-winning writer and educator. With Diane E. Papalia and Sally Wendkos Olds, she coauthored the fourth and the seventh through the twelfth editions of "Human Development" and the eighth through the twelfth editions of "A Child's World". She also is coauthor, with Dr. Papalia, Harvey Sterns and Cameron J. Camp, of "Adult Development and Aging". A former teacher, she has developed educational materials for all levels from elementary school through college and has prepared ancillaries to accompany the Papalia-Olds books. She is author or coauthor of four books addres...