Alex at Marginal Revolution took a Harvard test to determine his level of racial bias:

My Unconscious is Clear

The Implicit Association Test is revolutionizing the study of prejudice and bias.  The basic idea is simple, the test taker is asked to categorize a series of faces, hitting a right hand key for a white face and a left hand key for a black face.  Then the taker must similarly categorize a series of words as good or bad, words like wonderful, nasty, peace, hate etc.

Head over to his site to see how he did and what his thoughts about the test are. You can take this and a bunch of other tests yourself

IAT Home

It is well known that people don’t always ‘speak their minds’, and it is suspected that people don’t always ‘know their minds’. Understanding such divergences is important to scientific psychology.

This web site presents a method that demonstrates the conscious-unconscious divergences much more convincingly than has been possible with previous methods. This new method is called the Implicit Association Test, or IAT for short.

Personally, I think it’s a crock.