G. Hodson and M. Busseri, “Bright Minds and Dark Attitudes: Lower Cognitive Ability Predicts Greater Prejudice Through Right-Wing Ideology and Low Intergroup Contact,” Psych Sci 32 (2012): 187; C. Sibley and J. Duckitt, “Personality and Prejudice: A Meta-analysis and Theoretical Review,” PSPR 12 (2008): 248.