소개 저희에 대해

Each tool has an explicit scoring rule (for example reaction time in milliseconds, span length, accuracy %, or completion time). We document difficulty changes in the on-page guide so Beginner and Professional are not the same task wearing a different label.

Timing uses the browser clock available to the page. Display refresh rate, input devices, and background tabs can add noise—so we tell people to compare scores on the same device and difficulty. We do not invent “population percentile” marketing numbers we have not measured in a controlled study.

Some modules (like Ishihara-style plates) are educational demos, not clinical diagnoses. Where that matters, the tool page says so. For deeper reading, see our scoring methodology article and the science overview.