An agility-click test that measures your simple reaction time. The screen turns green at a random moment — click as fast as you can. Average human reaction time is around 250 ms; gamers and athletes often hit 200 ms or below.
How the test works
After you press start the screen waits a random 1 to 5 seconds, then turns green. Your time from green to click is recorded in milliseconds. Click before the green appears and the trial is voided to prevent cheating with anticipated clicks.
What affects your reaction time
Sleep is the dominant factor — even one short night raises your reaction time by 30 to 60 ms. Caffeine helps in the short term; alcohol slows you measurably. Display latency and mouse polling rate add their own delay; budget on roughly 10 to 25 ms of unavoidable hardware latency.
FAQ
- Is sub-150 ms possible?
- Real human reaction has a hard physiological floor around 100 ms. Times under 150 ms are exceptional; under 100 ms almost always indicate anticipation or input lag in your favor.
- Why are touchscreens slower?
- Capacitive touchscreens add 30 to 80 ms of input latency. For a clean comparison use a wired mouse on a low-latency monitor.
