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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 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.
Only 14% of the US population can see her move both ways.
Images taken from here