Test yourself for hidden bias at the Tolerance.org website

"In the United States, equality is protected by the Constitution and supported by civil rights laws. Yet reports of unequal treatment because of skin color, religion, gender, age, sexual orientation, country of origin, ability and other differences persist.
This discrimination is based on stereotypes and prejudice that social psychologists believe linger in most of us. Even though we believe we see and treat people as equals, hidden biases may still influence our perceptions and actions.

Created by psychologists at Yale University and the University of Washington, this collection of Implicit Association Tests (IAT) measures unconscious bias. We invite you to test yourself and reveal what may be lingering in your psyche. Each test takes about five minutes, and your privacy is protected -- no identifying information is collected or distributed.

Your test results may disturb you -- more than one million tests have been taken and the majority reveal unconscious bias. Dig deeper into the science behind the tests, into stereotypes and prejudice, and into the societal effects of bias."