VISUAL INHIBITION · 12 ROUNDS
Ignore the first flash. Respond as fast as possible only when the screen flashes a second time.
Play 12 rounds. Early responses and timeouts count as errors, then the test continues.
READY?
The interval changes every round, so watch instead of guessing.
Respond with Space, a mouse click, or a touch anywhere on the flash screen.
HOW TO PLAY
Start a round and keep your hand ready without pressing.
Ignore the first bright flash and continue watching through the random gap.
At the second flash, press Space or tap the flash screen before its countdown bar empties.
WAIT, THEN GO
A simple reaction test asks you to respond to one signal. This test also asks you to suppress that response when the first signal appears.
Random spacing between the flashes prevents one fixed rhythm from becoming a reliable shortcut.
READ YOUR RESULT
Your reaction time begins at the second flash. Early responses and timeouts reduce accuracy and are excluded from the reaction-time average.
In endless mode, the flash gap and response window become harder. One early response or timeout ends the streak.
QUESTIONS
Press only after the second flash. The large number inside the screen changes from 1 to 2 to make the signal clear.
No. Any input before the second flash is an early response. Standard mode records the error and continues; endless mode ends.
Random timing makes you identify the second visual event instead of memorizing a single delay.
Yes. Tap the large flash screen with one finger when the second flash appears.