Research on human and civil rights has only rarely addressed people's attitudes toward disability rights in the context of American society. This study was designed to gain a better understanding of why certain individuals might oppose expanded rights for people who have disabilities. Pearson's correlations revealed that individuals high on social dominance orientation (SDO) and right-wing authoritarianism (RWA) were more likely to reject rights for persons with intellectual and physical disabilities than individuals scoring lower on these factors. Structural equation analyses indicated that both SDO and RWA are directly implicated in opposition to expanded rights for these groups. Moreover, the effects of SDO on rights attitudes appear to be mediated through internal motivation to respond without prejudice.Research on human and civil rights attitudes has tended to address two fundamental questions: What is the structure of those attitudes? (e.g., Crowson, 2004;Diaz-Veizades, Widaman, Little, & Gibbs, 1995;McFarland & Matthews, 2005); and What factors predict their endorsement? (e.g., Cohrs, Maes, Moschner, & Kielmann, 2007;Crowson & DeBacker, 2008a, 2008bDiaz-Veizades et al., 1995;McFarland & Matthews, 2005;Moghaddam & Vuksanovic, 1990). Studies addressing the former question have tested whether attitudes toward human and civil rights may be better conceived as unidimensional versus multidimensional in nature, with some studies suggesting that these attitudes can be differentiated into domains such as economic, political, equality, and privacy rights (Crowson, 2004;Diaz-Veizades et al., 1995); as well as domains of rights endorsement, commitment, and restriction (McFarland & Matthews, 2005). Studies addressing the latter question have found that human and civil rights attitudes are predicted by a number of psychological and ideological correlates, including right-wing authoritarianism and social dominance orientation (Cohrs et al., 2007;Crowson, DeBacker, & Thoma, 2005, 2006McFarland & Matthews, 2005), universalism values (Cohrs et al., 2007), moral judgment development (Crowson & DeBacker, 2008b;Crowson, DeBacker, & Thoma, 2007;McFarland & Matthews, 2005;Narvaez, Getz, Rest, & Thoma, 1999), ethnocentrism (McFarland & Matthews, 2005, political conservatism McFarland & Matthews, 2005), and religious fundamentalism (Crowson & Brandes, 2008;Narvaez et al., 1999).With rare exceptions (e.g., Crowson & Brandes, 2008), many of the aforementioned studies have excluded attitudes pertaining to a group that has been historically marginalized within society: people with disabilities. Indeed, the prejudice and discrimination that people with disabilities face on a continual basis raises the question of whether or not these individuals are perceived by Americans as deserving of the rights that most citizens take for granted. A key aim of our research, therefore, is to strengthen our understanding of Americans' attitudes toward human and civil rights for people with disabilities, with particular emphasis on people wh...