About this game
Wait for green, then click as quickly as possible to measure your visual response time. The random wait prevents reliable timing guesses.
Reaction Test
Wait for green, then click as quickly as possible to measure your visual response time. The random wait prevents reliable timing guesses.
Ready for a round?
The game loads when you press Start. Check the controls before you play.
Game not visible? Reload it or open it separately.
How to play
Updated 2026-09-21How to play
Click the test area to get ready. Wait until it turns green, then respond. Click the result area to begin another trial.
Controls
Click with the mouse or tap the test area. Each trial needs one click to prepare and another to respond.
Scoring and ending
Results are milliseconds: lower is faster. Clicking early records “Too early” and is excluded from valid attempts and averages. Statistics last for the current page.
Practical tips
Position your pointer or finger first and watch the color signal. Compare several trials and the average rather than judging one unusually fast result.
What to play next
Quick challenges
Typing Practice
Practice random English words for one minute, balancing speed and accuracy. Character highlighting shows whether your input matches.
One player · Short session
Quick challenges
Color Switch
Identify the actual ink color within 30 seconds while ignoring the color word’s meaning. This is an attention and response game.
One player · Short session