Where you land
Your session average on a scale from 100 to 500 ms. Screens and mice add their own delay, so online times run a little slow.
Every try this session
Play a round to fill in the chart.
A quarter of a second, step by step
Drag through a typical tap. The brain map lights up the region doing the work at each moment.
What moves your number
Warm-up
Your first few tries are usually slowest. Take three before you judge.
Tiredness
A short night slows you and makes you less consistent.
Caffeine
A modest boost for most people, especially when tired.
Practice
Regular play trims times a little and makes them steadier.
Age
Simple reaction time slows gradually across adulthood.
Your device
Screens and mice can add 10–50 ms before your tap even counts.
In sprinting, pushing off the blocks less than a tenth of a second after the gun counts as a false start, treated as too fast to be a genuine reaction.
World Athletics rulesFrancis Galton timed the reactions of thousands of visitors to his London laboratory: one of the first attempts to measure the mind at scale.
Johnson et al., 1985Your raw speed
Wait for the signal, then react. Simple reaction time is the most basic measure of how fast your brain turns seeing into doing.
Where it matters most day to day
More speed games
All 40 games →Pick the right key for each signal.
Tap for targets, hold back for lures.
Is the target symbol in the group?
Judge which line was longer in a flash.