The effect of intergroup contact on secondary group attitudes and social dominance orientation

The current study tested the extent to which intergroup contact reduces social dominance orientation (SDO), producing secondary transfer effects. Participants were first-year undergraduate students randomly assigned to live with either a same-race roommate or a roommate of a different race in university housing. Participants completed a feeling thermometer and a measure of SDO at the beginning and end of the fall semester. Participants in interracial rooms reported lower levels of SDO and more positive attitudes toward secondary groups (i.e., racial/ethnic groups other than their roommates' group) than participants in same-race rooms at the end of the semester. Those in interracial rooms exhibited a significant change in SDO levels and attitudes across time, whereas those in same-race rooms exhibited no change. Furthermore, SDO fully mediated the effect of intergroup contact on attitudes toward secondary groups. These findings provide causal evidence of secondary transfer effects and indicate SDO as an underlying mechanism.