Gyroscope Benchmarks / Mind
Test your reaction time
This test measures how quickly you notice a visual signal and respond, a compact read on alertness that is sensitive to sleep and fatigue.
Why it matters
Reaction time is the gap between something happening and you doing something about it. A car braking ahead, a glass tipping off the counter, a child stepping off a curb. For most of the day it is invisible, and then for a quarter of a second it is the only thing that counts. It is also the plainest read on how awake your brain is. Simple reaction time slows when you are short on sleep, sick, jet-lagged, or hungover, and it slows well before you would call yourself impaired.
That last part is the reason to measure it. In one lab study, two weeks of six-hour nights produced cognitive deficits equal to two full nights without sleep, while people rated themselves only mildly impaired. The test used to show it was a simple reaction task much like this one. How you feel and how fast you respond can drift apart for weeks without you noticing.
Van Dongen et al., Sleep, 2003
With age the number drifts too. The Der and Deary table below puts the 20s near 280 to 294 milliseconds and the 70s near 364 to 404, with a gentle slope through midlife and a steeper one after 60. Day to day, though, the movement mostly tracks how rested you are. One median, taken the same way on the same phone once a month, lets you tell those two stories apart: a slow month with a bad-sleep explanation looks different from a slow year.
What this test measures
Flash Tap is a simple reaction task. You hold the phone still, watch the circle, and tap when it changes. The delay from signal to tap includes visual detection, attention, motor response, and the device's own timing path, so it is more useful as a repeated benchmark than as a verdict on your brain.
A classic psychomotor vigilance test also counts unusually slow responses as lapses. In a review of 141 PVT papers, a response at or above 500 milliseconds was the most common lapse definition. The standardized protocol treats a response below 100 milliseconds as a false start.
Basner and Dinges, Sleep, 2011
Calibrated laboratory hardware gives context for the number. Woods and colleagues measured a mean simple reaction time of 231 milliseconds, or 213 milliseconds after correcting for 17.8 milliseconds of display and response-device delay, in 1,469 adults aged 18–65.
Do the test right now
- 1For the phone route, open Flash Tap in Gyroscope. Hold the phone still, watch the center circle, and tap only when it lights up. The test takes about 60 seconds.
- 2Complete the full run of 20–30 taps. Keep the median, not the single fastest tap. Count anything under 100 milliseconds as a false start and anything at or above 500 milliseconds as a lapse.
- 3For the ruler route, ask a friend to hold a 30-centimeter ruler vertically with its zero mark level with your open thumb and index finger. Without warning, they release it and you catch it.
- 4Read the catch distance. A 10-centimeter fall is about 143 milliseconds and a 20-centimeter fall is about 202 milliseconds. Repeat several times and keep the middle result rather than your lucky best.
Reference bands
These are Gyroscope's practical bands for the median of a repeated phone test. They are not population norms, and the gap between 320 and 350 milliseconds is intentionally left as a transition zone.
| Phone median | Practical band |
|---|---|
| Under 250 ms | Fast |
| 250–320 ms | Typical |
| Over 350 ms | Slow |
Woods, Frontiers in Human Neuroscience, 2015. Hardware context for Gyroscope's practical phone bands.
Der and Deary modeled simple reaction time in 7,130 British adults. The values below are model predictions at each decade midpoint, rounded to the nearest millisecond from the paper's published coefficients. They come from a dedicated response box, not a touchscreen.
Der and Deary, Psychology and Aging, 2006
| Age | Men | Women |
|---|---|---|
| 20s | 280 ms | 294 ms |
| 30s | 284 ms | 295 ms |
| 40s | 290 ms | 301 ms |
| 50s | 302 ms | 315 ms |
| 60s | 324 ms | 344 ms |
| 70s | 364 ms | 404 ms |
Der and Deary, Psychology and Aging, 2006
Alert adults on calibrated lab systems often land around 200–300 milliseconds. Touchscreens can add tens of milliseconds through display, touch, and software latency, so phone scores often run higher. Compare your result with your own history on the same device.
How to improve
Simple reaction time is mostly a read on your state that day. Sleep, caffeine timing, alertness, and a steady hand move it far more than any practice at the test itself.
- Sleep the night before. Short sleep slows every response and adds lapses, the taps that land over 500 milliseconds. A full night is the single biggest lever you have, and it is the one you will not feel working.
- Time your caffeine. A coffee an hour before the test helps. A late one hurts tomorrow: 400 milligrams six hours before bed cut measured sleep by about an hour, and the sleepers did not notice.
- Test when you are awake. Mid-morning or early afternoon, not in the first minutes after waking and not late at night. Pick the hour once and keep it.
- Move a little first. A brisk five-minute walk before the test raises alertness. Sitting still at a desk for three hours does the opposite.
- Brace the phone and the finger. Rest the phone on a table or hold it against your other hand, keep the same finger about a centimeter above the screen, and use the same grip every time. Reaching from a lap adds motion you will read as slowness.
- React, do not predict. Guessing the flash produces false starts under 100 milliseconds, which are thrown out, and the tension it takes slows the taps that count. Relax the hand, watch the circle, and let the signal start the movement.
Drake et al., Journal of Clinical Sleep Medicine, 2013
Retest once a month, rested, on the same phone, at the same hour, and keep the median of the full run. Hold the setup steady and the line shows sleep and age rather than a change of grip.
Track it
Log it in the app.
Download Gyroscope and run Flash Tap in about a minute. See how you compare to your peers, to the studies, and to your own baseline over time.
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