Bruce King was a faculty member at the University of New Orleans from 1978 to 2007 and is presently at Clemson University. He has been honored as a Fellow in the Association for Psychological Science, American Psychological Association, and International Behavioral Neuroscience Society. Patrick J. Rosopa is an Associate Professor at Clemson University. He has published in various peer-reviewed journals including Psychological Methods, Organizational Research Methods, Journal of Modern Applied Statistical Methods, Journal of Managerial Psychology, and Human Resource Management Review. Currently, he serves on the editorial board of Organizational Research Methods, Journal of Managerial Psychology, and Research in Human Resource Management. Edward W. Minimum was a faculty member at San Jos? State University from 1948 to 1982 and served as chair of the Department of Psychology from 1961 to 1966. He was the only author for the first two editions of this textbook, which was first published in 1970. Dr. Preeti Kapur Associate Professor (Retd) Department of Psychology, Daulat Ram College, University of Delhi, Delhi, India Shreya Dubey Phd Candidate University of Amsterdam, Amsterdam School of Communication Research (ASCoR), Amsterdam, The Netherlands