Check this out! I found this on the blog of a friend of a friend.
It's a test that can discriminate between left brain and right brain people. I was, unsurprisingly, a right brain person. To me, the woman was spinning in a clockwise direction, and I couldn't imagine her spinning counter-clockwise at all. In fact, I kinda thought that it was B.S. until the grad student in my lab assured me that she could see the dancer spinning counter-clockwise (and this grad student is decidedly left brained).
Hmm, I wonder how one becomes left brained or right brained. I'll do some reading and try to add a bit to this post.
In the meantime, what are you?