SoundaryReaction Time Test — Free Online Reaction Speed Check
A simple reaction time test: tap the instant the screen flashes green. Takes 1–2 minutes over 5 trials, and reports your average and best reaction time in milliseconds, with every retake saved so you can track your trend. Free.
What's included
- Time
- ~2 min
- Price
- Free
FAQ
What does a reaction time test measure?
It measures simple reaction time — the interval from the moment a stimulus appears to the moment your finger moves. You wait through a red orb phase and tap as fast as you can when the screen flashes green; tapping early restarts only that trial. Your result is the average of 5 trials in milliseconds, following a classic paradigm dating back to Donders's 1868 work on the speed of mental processes.
What average counts as a normal reaction time?
Visual simple reaction time in healthy adults typically falls around 200–350 ms, and even F1 drivers or pro gamers rarely go below 150 ms. Touchscreens and mice add tens of milliseconds of input lag, so comparing your own records on the same device is more meaningful than comparing across devices. A slow score does not indicate any disorder — this is a self-check for reference, not a diagnostic test.
Can practice make my reactions faster?
To a degree, yes. As you get used to the task and your readiness improves, the first few retakes often show a practice effect of a few dozen milliseconds. But nerve conduction sets a biological floor, so gains level off, and day-to-day factors like sleep, fatigue, caffeine and age move your score more than training does. You will usually record your best times well-rested and alert.
How often should I retest, and how do I use the trend feature?
Every one to two weeks is plenty, and since the test takes under two minutes it is easy to repeat. Results are saved and shown against your previous records, and a trend built on the same device at a similar time of day is far more reliable than any single score. Watching whether your times drift slower during stretches of poor sleep or fatigue also makes it a useful condition gauge.
Source
This task is based on the paradigm from: Donders, F. C. (1868/1969). On the speed of mental processes. Acta Psychologica, 30, 412–431. This task is a Soundary implementation based on a published academic paradigm. It is not any commercial test product or its test form.
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This is a self-screening tool, not a medical diagnosis. If the result concerns you, please consult a mental health professional.