What Is Reaction Time?
Reaction time is the interval between the onset of a stimulus — visual, auditory, or tactile — and the beginning of the response action. Measured in milliseconds (ms), it is a critical performance metric in gaming, sports, driving, and any activity requiring rapid decision-making. This test measures Simple Reaction Time (SRT): your response to a single expected visual cue, which isolates pure reflexive speed from decision-making complexity.
Reaction Time Benchmarks
The average visual reaction time for adults is approximately 250ms. Professional FPS gamers typically score between 150–200ms, similar to elite athletes like sprint runners who react to starting pistols in around 120–160ms. Scores under 200ms are considered very fast, while above 300ms is below average. Mobile devices may add 10–30ms due to touch input processing latency, so results from a mouse are typically more accurate.
Factors That Affect Reaction Speed
Fatigue and sleep deprivation are the strongest negative factors — even mild sleep deprivation can add 50–100ms to your reaction time. Moderate caffeine intake and physical exercise both have measurable positive effects. Practice with fast-paced games or reaction-heavy sports like table tennis and badminton can also improve your baseline speed over time. Monitor response time and input lag can also slightly affect results in this test.
Frequently Asked Questions (FAQ)
Q. Does reaction time decline with age?
A. Yes, reaction time peaks in the early 20s and gradually slows with age. However, consistent training and a healthy lifestyle can maintain above-average reflexes well into later years.
Q. How accurate is this test?
A. Browser-based tests are highly accurate on desktop with a mouse — typically within ±5ms. Touch screens may add some latency. Always test on the same device in the same conditions for meaningful comparison.
Q. What if I click before the green signal?
A. Clicking before the signal triggers a "Too early!" warning and invalidates that attempt. A random delay of 1.5–4.5 seconds prevents predictive clicking and ensures the measurement reflects true reflexes.