1. Department of Social and Decision Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213,
2. Department of Operations and Information Management, The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania 19104,
3. Department of Psychology, Center for the Study of Brain, Mind and Behavior, Princeton University, Princeton, New Jersey 08540, and Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh, Pittsburgh, Pennsylvania 15260;, ,