K. Warner Schaie, PhD, is an Evan Pugh Professor of Human Development and Psychology and director of the Gerontology Center at Pennsylvania State University. He has previously held professional appointments at the University of Nebraska, West Virginia University, and the University of Southern California. Dr. Schaie received his BA from the University of California - Berkeley and his MS and PhD degrees from the University of Washington, all in psychology. He is the author or editor of 26 books and over 200 journal articles and chapters related to the study of human aging. Dr. Schaie is the recipient of the Distinguished Scientific Contributions Award of the American Psychological Association and of the Robert W. Kleemeier Award for Distinguished Research Contributions from the Gerontological Society of America. He was awarded the honorary degree of Dr. phil. h.c. by the Friedrich-Schiller-University of Jena, Germany.