Click as soon as the screen turns green. Five rounds give you your average reaction time in milliseconds.
Quick Answer
Reaction Time Test lets you: Click as soon as the screen turns green. Five rounds give you your average reaction time in milliseconds. To start, click the red area to begin a round.
Click the red area to begin a round.
The screen turns red, then green after a random pause. Don't click while it is red.
As soon as it turns green, click or tap. Your time in milliseconds appears.
After five rounds you see your average. Your best average is saved on this device.