Which way is this dancer spinning: clockwise or anti-clockwise? Your answer supposedly indicates how your brain works, although the article doesn’t explain the basis for that claim, or even where the picture came from.
My own results are puzzling. I initially saw the dancer to be spinning clockwise, which puts me in the right-brain category. That’s just plain wrong; I’m one of the most stereotypically left-brained people you will ever meet. I tried for several minutes to change the direction of the dancer’s spin, but couldn’t do it just by mental effort. Finally I discovered that by looking at the shadows of her feet, I could convince myself that she was spinning anti-clockwise. Now I can easily switch the direction at will. I’m not sure what any of this means, but it sure is interesting.
Source: Freakonomics
It means that the terms clockwise and anti-clockwise are meaningless when viewing an object perpendicular to the rotational axis.
She’s going one way if you look at it from the floor towards the sky, and the other if you looks from the sky to the floor.