According to their research, this tendency inverted among people of high cognitive ability. In other words, the smarter subjects in their study were likely to be prejudiced against groups considered conventional or conservative—groups perceived to have “high choice” in their associations.”
“People dislike people who are different from them,” Brandt and Crawford said in an interview with Broadly. “Derogating people with different worldviews can help people maintain the validity of their own world view.” In other words, if you see the world one way, you may rely on that perspective, so you might reinforce the idea that you’re right by believing other worldviews are wrong.
There was another polarized finding in their study. Brandt and Crawford found that people of low cognitive ability are prejudiced against groups that people didn’t choose to be part of, such as ethnic or LGBT groups. This is poignant in 2016, a time when conservative communities across the country are unifying around intolerance of transgender people, Muslim Americans continue to face grotesque prejudice, and police brutality is high.