If you see this lady turning clockwise you are using your right brain.
If you see her turning anti-clockwise, you are using your left brain.
Some people (only 14% of US population) can see her turning both ways, but most people see her only one way.
See if you can make her go one way and then the other by shifting the brain’s current.
If you can switch between seeing her turn either way at will without shifting your gaze, your IQ is above 160… which is almost at genius level!
This was devised at Yale University for a 5 year study on the human brain and its functions.
Source: http://www.readnrock.com/?p=38
I started to see her turn clockwise, as I am a right brainer.
I tried to make her turn anti-clockwise, and realized some techniques like shifting your eyes left-to-right, right-to-left and covering eyes could work, if done at the correct time.
After 10 min, I found the rhythm and where to focus, and I can make her turn (almost) at will, like doing mind control! With some hard work, I can also reach a genius level! (: