Are you left-brained or right-brained? Check out the animation of the dancer. If you see her rotating clockwise, it means you’re right-brained, and if she’s rotating anti-clockwise, you’re left-brained. If you’re real good you should be able to switch the rotation just by thinking about it.

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At first it was anti-clockwise for me, but then I looked away from the screen and now it’s clockwise, and so far I’m set in my ways. I wonder if that means anything special.

Update: It’s back to anti-clockwise for me again. Of course if you’re using your whole brain, you’d know that she is doing both, depending on whether you are looking from above or below.