Color Stroop

This is a brain test that uses colors and mind tricks to force you to concentrate and give the correct answer within second.

The brain is divided into two halves (hemispheres).
Usually, the left half of the brain controls the right side of the body.
The right half of the brain controls the left side of the body.
Your right brain tries to say the color and your left brain insist to say the word, thus, causes you to slow down the process.

In psychology, the Stroop effect is a demonstration of interference in the reaction time of a task. When the name of a color (e.g., "blue", "green", or "red") is printed in a color not denoted by the name (e.g., the word "red" printed in blue ink instead of red ink), naming the color of the word takes longer and is more prone to errors than when the color of the ink matches the name of the color. The effect is named after John Ridley Stroop, who first published the effect in English in 1935.