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  Alertness Tester

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You have to click on the smiley as soon as it appears on the white screen. If you click on the canvas instead of the smiley, you will be penalized with a second for every click (an "ouch!" appears at that spot).

The alertogram is on the top right corner. It records your response time for each try. There are twenty chances per game.

The alertness meter measures your average alertness. I chose 0.8 seconds for a normal person (considering myself as normal). 0.3 seconds will swing it all the way towards right (green zone), and 2.0 seconds will swing it well into the extreme red zone!

Caution: My browser crashes when I try to reload the tclet (in order to abort)


Carsten suggested me to paint the smiley in yellow. It was originally red