Where your click lands
Grades come from the median of five clicks, read off the same percentile curve cited everywhere on this site. One flukey run won't earn the badge. Steady numbers will.
Consistency beats a lucky best
Picture two players who both record a 180 ms best round. One hits it once in ten attempts. The other stays within roughly 15–20 ms of that mark every single time. The second person is the genuinely faster one. A narrow spread is much harder to fake, and it's what holds up when the moment actually counts. That's the reason your score here comes from the median of your rounds instead of your quickest single click.
The gap between rounds isn't just noise waiting to be averaged out, either. Cognitive-science research treats trial-to-trial variability in reaction time as a meaningful signal in its own right. It reflects how steady a person's attention stays from one moment to the next, not simply measurement error. Your five rounds work the same way: the tighter they cluster, the more trustworthy the number.
| Pattern | What it looks like | What it tells you |
|---|---|---|
| Streaky | A single fast round buried among much slower ones | An outlier rather than a repeatable skill, and the median won't be fooled by it |
| Steady | Each round lands within roughly 15–20 ms of the one before | A tighter spread, which research ties to steadier attention rather than luck |
How fast can a human possibly react?
Real reactions bottom out somewhere close to 100 ms, and the clearest evidence sits on the athletics track. World Athletics disqualifies any sprinter whose starting-block sensors log a reaction below 100 ms. Their reasoning: nobody can process the gun and begin moving faster than that, so a quicker figure means the athlete moved before they had actually reacted.
Even the elite rarely approach that ceiling. One analysis covering more than 1,300 sprinters at IAAF World Championships examined the very fastest starts of all, the ones in the 100 m final itself. Those average about 142 ms for men and about 153 ms for women. A separate look at the Beijing Olympics field turned up virtually no valid reaction times between 100 ms and roughly 117 ms, about the gap you would predict if 100 ms sits right at, or just past, the edge of what is physiologically possible.
The same principle drives the 80 ms floor used here. Anything quicker gets logged but flagged as voided, and the round replays instead of counting toward your score. Landing under 150 ms consistently hits this site's own "Legend" cutoff, ahead of roughly 98% of visual test-takers. Get there regularly and you are almost certainly guessing when the delay will end 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 150 ms | The top 2% of visual test-takers on the curve this site grades against |
| Simple auditory reaction, lab average | ~170 ms | Sound consistently produces faster responses than sight (Kosinski, 2008) |
- 01Kosinski, R. J. (2008). A literature review on reaction time. Clemson University. Kosinski, R. J. (2008). A literature review on reaction time. Clemson University.
- 02World Athletics (2009). IAAF Sprint Start Research Project: is the 100 ms limit still valid? World Athletics (2009). IAAF Sprint Start Research Project: is the 100 ms limit still valid?
- 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. Tønnessen, 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.