Human Precision
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Timing challenge

Internal timing test

Start the clock, let the digits disappear and stop it as close to the target interval as possible.

Timing testReady

How timing is measured

Each round records the absolute difference between your stop and the target time. The score combines average error with consistency across intervals.

Early and late errors

Stopping 120 milliseconds early and 120 milliseconds late count equally. The task measures closeness to the target, not direction.

Practice and interpretation

You can improve through familiarity with the task. The result measures performance inside this browser challenge rather than a broad cognitive ability.

Want one complete score? The full daily challenge combines all six skills in one run.