Reaction Tests by Signal

The reaction time test measures one thing: how quickly you press after a light turns green. The tests here change the signal and see what happens to your time.

6 pages

Audio Reaction TestTap the pad to start, then click or tap it or press any key the moment you hear the beep. Your average of five tries, in milliseconds. Quiet beep · Wired headphones · Noise burst
Drag Racing Reaction Time TestTap the pad to start, watch three ambers come down, and leave on green: click or tap the pad, or press any key. Shallow staging and rollout · Last amber only, 1971 pro start · Ten tries, middle one counts
Color Reaction TestTap the pad to start, then click or tap it or press any key on the green circle, and keep still on the red square. Mostly go, rare hold · Stacked lamps · Pale colours, same shapes
Driver Reaction Time TestTap the pad to start, then click, tap or press a key the moment the red square appears. 100 ms at 70 mph · Two-second gap · Brake on the red square
Red Light Green Light Reaction Time TestTap the pad to start, then tap on the green lamp and keep still on red. All green, nothing to freeze on · Why red comes more often · Green light go, red light freeze
Race Start Reaction TestTap the pad to start, watch five red lights come on, and tap the moment they all go out. Space bar only · Best of five starts · Why the hold is random

More about these tools

The audio test swaps the light for a tone, so you react by ear. The colour test adds a decision: press for the go shape, hold still for the rest, and count the mistakes as well as the milliseconds. The drag racing test counts a column of amber lamps down to green, the way a drag strip starting tree does, and scores how close to green you leave without jumping it. The sound and drag tests take five tries and the colour test ten signals. Each one reports in milliseconds and keeps its own personal best in this browser, because times from different signals should not be mixed.

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