John T. Cacioppo is Tiffany and Margaret Blake Distinguished Service Professor in the Department of Psychology, Director of the Social Psychology Program, and Co-Director of the Institute for Mind and Biology at the University of Chicago.

Gary G. Berntson is Professor of Psychology, Psychiatry, and Pediatrics at Ohio State University.

C. Sue Carter is Professor of Psychiatry and Codirector of the Brain Body Center at the University of Illinois at Chicago.

Richard J. Davidson is the William James and Vilas Research Professor of Psychology and Psychiatry at the University of Wisconsin. He is coeditor of Brain Asymmetry (MIT Press, 1994) and Foundations in Social Neuroscience (MIT Press, 2001).