The effect of social categorization on trust decisions in a trust game paradigm Cañadas Espinosa, Elena Rodríguez Bailón, Rosa María Lupiáñez Castillo, Juan Trust game Categorization Individuation Ingroup-outgroup perception This study investigates whether participants use categorical or individual knowledge about others in order to make cooperative decisions in an adaptation of the trust game paradigm. Concretely, participants had to choose whether to cooperate or not with black and white unknown partners as a function of expected partners’ reciprocity rates. Reciprocity rates were manipulated by associating three out of four members of an ethnic group (blacks or whites consistent members) with high (or low) reciprocity rates, while the remaining member of the ethnic group is associated with the reciprocity of the other ethnic group (inconsistent member). Results show opposite performance’s patterns for white and black partners. Participants seemed to categorize white partners, by making the same cooperation decision with all the partners, that is, they cooperated equally with consistent and inconsistent white partners. However, this effect was not found for black partners, suggesting a tendency to individuate them. Results are discussed in light of the implications of these categorization-individuation processes for intergroup relations and cooperative economic behavior. 2015-12-16T13:14:38Z 2015-12-16T13:14:38Z 2015 info:eu-repo/semantics/article Cañadas, E.; Rodríguez-Bailón, R.; Lupiáñez Castillo, J. The effect of social categorization on trust decisions in a trust game paradigm. Frontiers in Psychology, 6: 1568 (2015). [http://hdl.handle.net/10481/39212] 1664-1078 http://hdl.handle.net/10481/39212 10.3389/fpsyg.2015.01568 eng info:eu-repo/semantics/openAccess Frontiers Research Foundation