Arena — Lock-On
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Track a moving target — time on target. 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
pursuit tracking · closed-loop controlThe science behind it
Tracking a moving target is continuous closed-loop control — the pursuit task pilots and surgeons are tested on. The target follows a seed-derived path, so the run can be replayed and re-scored exactly.
Reading your score
Time on target is your aim-lock uptime, 0 to 100; higher is better. Grind it against your own trend rather than an absolute rank — the scoring floor is still in calibration, so ranks stay provisional.
The honest limits
Its time resolution is capped by your mouse polling rate and the browser's sampling cadence, it is the browser-reported pointer in screen space, and it is same-setup relative with 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.