Optical Illusion - Clockwise Or Counter-Clockwise?

A friend of mine sent me a link to the image above, and it’s pretty crazy. Basically if you see the woman spinning clockwise - you are supposedly more right-brained; if you see her spinning counter-clockwise, you are supposed to be more left-brained. That's a myth and not true.
The image is not objectively “spinning” in one direction or other. It is a 2-dimensional image that is simply shifting back and forth. Our visual processing assumes we are looking at a 3-D image and it uses clues to interpret it as such. Or, without adequate clues, we may just arbitrarily decide a best fit - spinning clockwise or counterclockwise. And once this fit is chosen, the illusion is complete - we see a 3-D spinning image.

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At first I saw her spinning clockwise but then once I saw her go counter-clockwise, I couldn’t get the clockwise view back. My friend could only see the clockwise view for the longest time, but then finally saw her go counter-clockwise. Have some fun with it. Probably the funniest part of this is trying to convince someone that she’s spinning differently than they see her. More info here.

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