I’m sure the good folks at Harvard would object to me calling it a “Prejudice Test”, but that’s basically what the Implicit Association Test measures. It’s an on-line psychology test, that measures your bias towards certain populations or concepts. Unlike most psych tests — typically the “soft” kind — this one is built around a true experimental design with a quantitative response: the time it takes you to associate, say, the work “shameful” with the picture of a gay couple. It’s hard to describe (although Slate makes a good attempt); you really have to try it to see what’s going on. There are many tests you can try: for Race, Gender, Religion, even Presidents. I tried the Gay one, and according to the test I have a “moderate automatic preference for Gay People compared to Straight People”. The results may surprise you.