Perceptions of attitudinal similarity in ethnic groups in the U.S.: ingroup and outgroup homogeneity effects

The outgroup homogeneity phenomenon was examined by having majority group members (White Americans) judge the variability in attitudes about intergroup relations in their own group and one outgroup (African Americans). A preliminary study found the threat of the attitude statements to the group doing the judging seemed to affect whether or not participants showed outgroup or ingroup homogeneity. For the present study, statements about ethnic group relations were prerated to obtain two sets of items that aroused either high or low threat to White Americans. White students judged the homogeneity of these items for their own group and for African Americans. Outgroup homogeneity was found for the low threat items and ingroup homogeneity was found for the high threat items. This study demonstrates that the homogeneity effect depends on the threat of the attitude content to the group doing the judging. © 1997 John Wiley & Sons, Ltd.