JOSEPH ZEIDNER is Professor of Administrative Sciences and of Psychology at The George Washington University. He authored Scientific Selection of Personnel and Guide to Psychological Tests (1963), coauthored Behavioral Science in the Army: A Corporate History of the Army Research Institute (1988), and edited Human Productivity Enhancement, Volumes 1 and 2 (Praeger, 1987 and 1988).CECIL D. JOHNSON is a Research Consultant to The George Washington University, with more than 30 years of experience in personnel research.