We were testing how to use cognitive biases as a gateway to move people’s perceptions of racial out-groups. We were using questions and images clearly designed to elicit racism in our subjects. As I watched a video of a man who was a participant in one of the field experiments, who’d been provoked by a CA researcher’s guided questioning into spasms of rage, racist insults flying from his mouth, I started to confront what I was helping to build.

