Where your click lands
Grades apply to the median of five clicks, read off the same percentile curve cited throughout this site. A single flukey run doesn't earn the badge — steady numbers do.
Consistency beats a lucky best
Two people can both post a 180 ms best round. One does it once in ten tries; the other lands within about 15–20 ms of it on every attempt. The second person is the genuinely faster one — a tight spread is harder to fake, and it's the number that shows up when it actually matters. That is why this site scores the median of your rounds, never your single fastest click.
The gap between your rounds isn't just noise to be averaged away, either. Trial-to-trial variability in reaction time is itself treated as a meaningful signal in the cognitive-science literature — an indicator of how stable someone's attention is from moment to moment, not simply measurement error. A tighter spread across your five rounds points to a more reliable number, in exactly the same sense.
| Pattern | What it looks like | What it tells you |
|---|---|---|
| Streaky | One fast round buried among several much slower ones | An outlier, not a repeatable skill — the median isn't fooled by it |
| Steady | Every round lands within about 15–20 ms of the last | A tighter spread, which research links to more stable attention rather than luck |
How fast can a human possibly react?
Genuine reactions bottom out somewhere close to 100 ms, and the clearest proof of that lives on the athletics track. World Athletics disqualifies any sprinter whose starting-block sensors register a reaction under 100 ms, on the grounds that no one can process the gun and start moving any faster than that — reacting sooner means the athlete moved before actually reacting.
Even elite sprinters rarely get close to that limit. An analysis of over 1,300 sprinters at IAAF World Championships found the fastest reaction times — in the 100 m final itself — average about 142 ms for men and about 153 ms for women, and a separate study of the Beijing Olympics field found essentially no valid reaction times recorded between 100 ms and about 117 ms — roughly the gap you'd expect if 100 ms really does sit right at, or just past, the edge of what's physiologically possible.
This site enforces the same idea with an 80 ms floor: a response faster than that is recorded but marked voided, and the round replays rather than counting toward your score. If you find yourself consistently under 150 ms — this site's own "Legend" cutoff, faster than about 98% of visual test-takers — you are almost certainly anticipating the timing of the delay rather than reacting to the stimulus.
| Benchmark | Value | Source |
|---|---|---|
| World Athletics false-start threshold | under 100 ms | Official rule — any sprint-start reaction this fast is disqualified |
| Elite sprinters, 100 m final | ~142 ms (men) / ~153 ms (women), mean | Fastest round at IAAF World Championships (Tønnessen et al., 2013) |
| This site's "Legend" tier, visual click test | under 149 ms | Top 2% of visual test-takers on the curve this site grades against |
| Simple auditory reaction, lab average | ~150 ms | Reacting to sound is consistently faster than reacting to sight (Kosinski, 2008) |
- 01Kosinski, R. J. (2008). A literature review on reaction time. Clemson University. Link
- 02World Athletics (2009). IAAF Sprint Start Research Project: is the 100 ms limit still valid? Link
- 03Tønnessen, E., Haugen, T., & Shalfawi, S. A. I. (2013). Reaction time aspects of elite sprinters in athletic world championships. Journal of Strength and Conditioning Research, 27(4), 885-892. Link