How it works
- Tap the box (or press Space) to start.
- The box turns red. Wait – it will turn green after a random delay of about one to four seconds.
- Tap the moment it turns green. Tapping too early doesn’t count; just tap again to retry.
- After five tries you get your average and a rating. Your best average is saved in this browser.
What is a good reaction time?
Most people score between 200 and 300 milliseconds on a test like this. Under 200 ms is very fast. Your device also matters: screens, mice and especially touchscreens can add tens of milliseconds, so compare scores on the same device.
How to get a better score
- Keep your finger resting on the screen or mouse button so you only need to press.
- Look at the centre of the box rather than the edges.
- Don’t try to guess the timing – the delay is random, so guessing usually means tapping early.
- Take the test when you are rested; tiredness slows reactions noticeably.
Put your reflexes to work in Whack-a-Mole.