I have to say my first thought was she's spinning clockwise, and I had to really focus to see her spinning anti-clockwise, but I'm a Physics student and pride myself on being very logical, so I would have thought I would be strongly "left-brained," so I have to side with ZenGum, I don't think this trick gives much insight into mental function.
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"Only a person who risks all that he cannot keep,
to gain that which he can never lose,
is truly free."
Anonymous Poet
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