In my Diversity In American Society class, we had to take the Harvard Bias Test online. There were many different types of tests on this website. I have taken the age, sexuality, and weight preference tests.
Although it is said that many people find these tests valid, I do not. I feel that it is just a game and if you can concentrate and press the right keys you will have no preference and if you mess up you will have a preference one way.
The tests are somewhat fun and interesting to take for a class assignment but I do not find them valid, nor do I feel they help one learn anything.