How does the time perception test work?

You select a target duration (or enter a custom value), hit Start, and the visual timer disappears. You must hit Stop using your internal sense of time. The game calculates your exact deviation down to sub-millisecond precision.

How accurate is the timing engine?

The game uses JavaScript's high-resolution `performance.now()` API, providing timing accuracy to less than 1 millisecond.

What performance tiers exist?

Tiers are calculated based on absolute difference from target: Human Metronome ( 3.0s).

All experiments

How well do you know a second?

Hit Start, then hit Stop at exactly your chosen time.
No timer. No cheating.

Target duration

seconds

or press Space / Enter

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