Arena — Flick Grid
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Flick to seed-placed targets — Fitts throughput. Reaction time uses the pointer event.timeStamp correlated to stimulus onset; the seed-derived run is re-scored server-side. Same-setup — not a lab-grade replacement for the tests.
The science, playfully
Fitts's law · target selectionThe science behind it
Flicking to a target is the most-studied movement in motor science: Paul Fitts showed the time to hit one scales with the log of its distance-to-size ratio, so aiming behaves like a communication channel with a bitrate.
Reading your score
Your headline is aim throughput in bits per second, with the spread of your clicks setting the effective target size — so accuracy is baked in and spraying cannot cheat it. There is no validated "good = X" band yet; watch it trend up against your own past sessions and like-for-like hardware.
The honest limits
We measure the pointer the browser reports, in screen pixels — shaped by your sensitivity, DPI, and OS mouse acceleration. That is the pointer, not your hand, and not motion capture, so throughput is same-setup relative and carries a ± confidence band.
Per-action telemetry (stimulus onset, response event.timeStamp, sub-frame cursor path for aim modes, per-trial responses for decision modes) is re-derived from the seed and re-scored on the server. Ranks are provisional in beta.