Two Harvard Psychologists devised a test called the Implicite Association Scale which is designed to identify your racial preferences. I've been looking for a video that actually demonstates the process and I found this clip in Youtube. It was illuminating for me to have the test discussed by the people who designed it as well as those who particpated in this NBC Dateline project. Here's the link:

http://www.youtube.com/watch?v=YQUDik69Nw&feature=related