There's a long-standing and somewhat uncomfortable finding in psychology: that low IQ, conservative social beliefs and prejudice — including anti-gay attitudes and racism — are all linked. Many studies have found this relationship — so much so that a 2015 meta-analysis of the research suggested that researchers who conduct studies of people's ideology and prejudice should take participants' cognitive ability into account.
New research, though, suggests that there's more to the story. When the definition of prejudice is expanded beyond its usual meaning — that is, holding negative attitudes toward historically powerless minority groups— it turns out that people all along the IQ spectrum show prejudiced attitudes.
In other words, intelligence doesn't determine if you're prejudiced, but rather the target of that prejudice, the study found. Both the smart and the dumb have biases, but those biases are toward different groups of people, according to the new study, published in the journal Social Psychological and Personality Science. [Fight, Fight, Fight: The History of Human Aggression]