A current WSJ article, "Why Tribalism Took Over Our Politics. Social science gives an uncomfortable explanation: Our brains were made for conflict" https://www.

A current WSJ article, "Why Tribalism Took Over Our Politics. Social science gives an uncomfortable explanation: Our brains were made for conflict" https://www.wsj.com/politics/why-tribalism-took-over-our-politics-5936f48e https://www.wsj.com/politics/why-tribalism-took-over-our-pol... is related to your question: 'Party allegiance can affect our judgment and behavior, many experiments show. When Shanto Iyengar of Stanford University and Sean J. Westwood, then at Princeton University, asked a group of Democrats and Republicans to review the résumés of two fictitious high-school students in a 2015 study, their subjects proved more likely to award a scholarship to the student who matched their own party affiliation. People in the experiment gave political party more weight than the student’s race or even grade-point average. In a landmark 2013 study, Dan Kahan, a Yale University law professor, and colleagues assessed the math skills of about 1,000 adults, a mix of self-described liberals, conservatives and moderates. Then, the researchers gave them a politically inflected math problem to solve, presenting data that pointed to whether cities that had banned concealed handguns experienced a decrease or increase in crime. In half the tests, solving the problem correctly showed that a concealed-carry ban reduced crime rates. In the other half, the correct solution would suggest that crime had risen. The result was striking: The more adept the test-takers were at math, the more likely they were to get the correct answer—but only when the right answer matched their political outlook. When the right answer ran contrary to their political stance—that is, when liberals drew a version of the problem suggesting that gun control was ineffective—they tended to give the wrong answer. They were no more likely to solve the problem correctly than were people in the study who were less adept at math.'