Get that anterior cingulate gyrus pulsing in your brain when you play Stroople. Inspired by probably the most famous psychology experiment ever, the Stroop Test, Stroople keeps ramping up the challenge. Go on, inhibit the impulse to keep on tapping and see how high you, your family and friends can score. Improve your Stroople skills and lower your error count to unlock bonus levels.

Designed by Dr. Greg Hooper, this interpretation of "the Stroop" takes advantage of the iPhone's multimedia capabilities to add a bit of fun to the exercise. Match the words to the color and keep an eye out for incorrect spelling!

Currently available in English, Spanish, French and German. More to come.