Research has shown that in-group favoritism is associated with concerns over the maintenance of social norms. Here we present two studies examining whether genetic factors underpin this association. A classical twin design was used to decompose phenotypic variance into genetic and environmental components in two studies. Study 1 used 812 pairs of adult U.S. twins from the nationally representat...

Are the sources of ethnocentrism rather more sociological than psychological in nature? In order to answer this question, we review a classic debate between sociologists and psychologists. From this debate we distil two implicit theoretical models which are transposed into explicit and competitive models. A number of lacunas are filled with recent theoretical contributions and, subsequently, th...

The Leave campaign in the U.K., which advocated exiting the European Union, emphasized anxiety over immigration and the need to take control of the U.K.'s borders. Citizens who expressed concerns about immigration to the U.K. were more likely to vote to leave. Two correlational studies examined the previously unexplored question of whether the Brexit vote and support for the outcome of the E.U....

Extending previous research on the relation of Big-Five personality with right-wing authoritarianism and social dominance orientation, we examined the relationships of Big-Five facet scores rather than factor scores. The results (N = 332) of stepwise regression analyses showed that Openness to Experience was the only significant predictor of right-wing authoritarianism at the factor level, wher...

This research assessed the correlates of homophobia and transphobia in heterosexual and homosexual individuals, based on a theory of different sources of perceived symbolic threat to social status. Compared to 310 heterosexual college students, a sample of 30 gay male and 30 lesbian college students scored lower on homophobia, transphobia, and religious fundamentalism. Mean gender differences w...

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Despite their important implications for interpersonal behaviors and relations, cognitive abilities have been largely ignored as explanations of prejudice. We proposed and tested mediation models in which lower cognitive ability predicts greater prejudice, an effect mediated through the endorsement of right-wing ideologies (social conservatism, right-wing authoritarianism) and low levels of con...

The structure of beliefs about the nature of homosexuality, and their association with antigay attitudes, were examined in three studies (Ns = 309, 487, and 216). Contrary to previous research, three dimensions were obtained: the belief that homosexuality is biologically based, immutable, and fixed early in life; the belief that it is cross-culturally and historically universal; and the belief ...