A series of online tests known as Implicit Association Tests measure subconscious bias in areas of race, gender, age, ethnicity, religion, or sexual orientation. Follow the link to try. "Implicit Association Tests (IATs) have been self-administered online by millions, many of whom have been surprised—sometimes unpleasantly—by evidence of their own unconscious attitudes and stereotypes," says Anthony G. Greenwald who originally developed the IATs. And now to Greenwald's pleasant surprise, an IAT has been developed to test the longevity of romantic relationships by examining subconscious biases each partner may have.