Dehumanization and Guilt as Distinct but Related Predictors of Support for Reparation Policies Sven Zebel University of Amsterdam Anja Zimmermann University of Amsterdam G. Tendayi Viki University of Kent Bertjan Doosje University of Amsterdam In two studies, we predicted that support for reparation policies would be influenced positively by feelings of group-based guilt and negatively by dehumanization of the out- group. We also hypothesized that a valence manipulation of the ingroup’s behavior would cause differences in such support which would be mediated by guilt. In the first study, we manipulated the valence of past ingroup behavior and assessed guilt, dehumanization, and reparation support. As expected, guilt predicted positively and dehumanization negatively participants’ support. In addition, guilt partially mediated the manipulation effects on policy support. Consistent with previous research, guilt and dehumanization were unre- lated. In Study 2, we assessed individual differences in dehumanization before the manipu- lation and examined their associations with guilt and reparation support. Initial analyses replicated Study 1. In addition, guilt partially mediated the influence of dehumanization on reparation support. Results suggest that the presence of guilt motivates support for repa- ration policies, while the absence of guilt explains in part why individual differences in dehumanization inhibit such support. KEY WORDS: dehumanization, group-based guilt, reparation, policy attitudes, valence Political Psychology, Vol. 29, No. 2, 2008 193 0162-895X © 2008 International Society of Political Psychology Published by Blackwell Publishing. Inc., 350 Main Street, Malden, MA 02148, USA, 9600 Garsington Road, Oxford, OX4 2DQ, and PO Box 378 Carlton South, 3053 Victoria Australia