Paul sent this to me.  Click on the image to go to the the post at Perth Now. The claim is that it shows your brain hemisphere dominance.  If she appears to spin counter clockwise you have left brain dominance. Clockwise is right brain.

My initial response is counter. I can switch to clockwise buy looking at her standing foot.  Then it is difficult to get her to spin counter clockwise but I can do it by looking at the shadow.