Guide
How the Reaction Time Tests Work
What each test measures, how scoring works (median of five attempts), and what browser and device latency mean for your numbers.
How the Test Works
- 1.
Press start. The panel turns red — wait, and don't click yet.
- 2.
After a random delay (2–5 seconds), the panel turns green.
- 3.
Click, tap, or press Space the instant you see green.
- 4.
Clicking early is a false start: that attempt doesn't count, so wait for green.
- 5.
Complete five attempts to get your median score, best click, and percentile.
FAQ
For a visual click test, the typical median is around 250–280 milliseconds. Under 230 ms is quick, under 200 ms is genuinely fast, and consistent sub-180 ms medians are rare — usually gamers or athletes on fast hardware.
A single attempt is noisy — one lucky guess or one lapse can swing it by 100 ms. The median of five attempts throws away the outliers and measures the speed you can actually repeat.
That's a false start: the attempt is discarded and you retry it. Guessing the timing would defeat the point of the test, so early clicks never count toward your score.
Touchscreens, mice, and trackpads have different input latency, and screens differ in refresh rate. That's hardware, not reflexes — which is why the site tracks a separate personal best per device.
Somewhat. Sleep, caffeine timing, and practice on the specific task each shave off real milliseconds, and warmed-up runs beat cold ones. Raw simple reaction speed is mostly physiological, but your consistency and choice-reaction speed respond well to training.
Once a day there's a seeded challenge — the same sequence of rounds for every player. Finish it to keep your streak, and every past day stays playable in the archive.