These scientists can prove it's possible to reduce prejudice

http://www.vox.com/2016/4/7/11380974/reduce-prejudice-science-transgender

From the site:

In a typical canvassing conversation, a person knocks on the door and spews statistics and facts to convince you to vote for a ballot measure. Those interactions are at best instantly forgettable and at worst incredibly annoying.

Broockman and Kalla were studying a different type of conversation, one developed in the Leadership LAB, a program of the Los Angeles LGBT Center in the wake of California's Proposition 8 that banned gay marriage. Frustrated by the loss on Prop 8, the LGBT Center's Dave Fleischer set out to talk to voters about why they decided against marriage equality. The conversations became the basis for a new technique.

The key difference between Fleischer's technique, sometimes called "deep canvassing," and the standard model is that Fleischer has voters do most of the talking.

"The key part of this is having people think back on their real, lived experience in an honest way," Fleischer tells me. "Everything we do is driven by that."

In talking about their own lives, the voters engage in what psychologists call "active processing." The idea is that people learn lessons more durably when they come to the conclusion themselves, not when someone "bitch-slaps you with a statistic," says Fleischer. Overall, it's a task designed to point out our common humanity, which then opens the door to reducing prejudice.