Christopher J. Hopwood, PhD, is Professor of Psychology and Head of the Social and Personality Psychology area at the University of California, Davis. He has published numerous articles, book chapters, and books on personality processes and psychological assessment. Dr. Hopwood is Associate Editor of Journal of Personality and Social Psychology and Journal of Personality Assessment, and is Consulting Editor for several other journals. Dr. Hopwood is also a founding member of the Personality Change Consortium and board member of the North American Society for the Study of Personality Disorders.

Robert F. Bornstein, PhD, is Professor of Psychology at Adelphi University. He has published numerous articles, book chapters, and books on personality dynamics, assessment, diagnosis, and treatment. Dr. Bornstein is a Fellow of the American Psychological Association, the Association for Psychological Science, and the Society for Personality Assessment. He is a five-time recipient of the Walter G. Klopfer Award for Outstanding Statistically Based Research Article from the Society for Personality Assessment, and received the Theodore Millon Award in Personality Psychology from the American Psychological Foundation.