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🧠 Neural Reflex & Input Latency

Human Reaction Time Benchmark

Measure your visual reaction time with sub-millisecond hardware accuracy. Wait for the red screen to turn green, click as fast as possible, and calculate your 5-trial median reflex score.

Last Reaction---milliseconds
5-Trial Average---median score
Trial Progress0 / 5completed
Best Reaction---personal best

CLICK TO START

When the red screen turns green, click as fast as you can.

5-Trial Series:
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The Neuroscience of Human Visual Reaction Time

Human reaction time represents the total temporal duration required for a sensory stimulus to be captured by sensory organs, transmitted through the nervous system, processed by the cerebral cortex, and executed as a muscular command:

Physiological StageTypical Duration (Δt)Biochemical & Physical Process
1. Retinal Phototransduction20 – 40 msRods and cones in the retina convert photons from the green screen into electrical impulses.
2. Optic Nerve Transmission15 – 25 msAxons of retinal ganglion cells transmit action potentials to the lateral geniculate nucleus (LGN).
3. Visual Cortex Processing50 – 80 msPrimary visual cortex (V1) interprets color change and communicates with the motor cortex.
4. Spinal Cord Motor Command20 – 30 msMotor neurons send depolarization signals down the arm to the flexor digitorum muscles.
5. Muscle Fiber Contraction30 – 50 msFinger physically actuates the mouse microswitch leaf.
Total Biological Latency150 – 225 msStandard healthy human response floor.

How Hardware & Display Setup Influences Your Reaction Score

While biological latency accounts for the majority of your score, hardware input lag can artificially inflate your reaction time by 25ms to 60ms:

  • Display Refresh Rate (Hz): A 60Hz monitor takes up to 16.66ms to scan out a new frame, whereas a 240Hz monitor displays the green signal within 4.16ms.
  • Browser Compositor & V-Sync: V-Sync forces frame buffers into triple-buffering queues, introducing 1 to 2 frames of extra display latency.
  • Mouse Polling Rate: An 8000Hz gaming mouse communicates your click to the operating system within 0.125ms, compared to 8.0ms on 125Hz generic mice.

Reaction Time Benchmarking Percentiles

  1. < 160 ms (99th Percentile): Elite Esports Pro tier; exceptional neural conduction and low-latency display setup.
  2. 160 – 190 ms (90th Percentile): Highly trained gamers and competitive athletes.
  3. 190 – 230 ms (50th–75th Percentile): Standard average human visual reaction time.
  4. 230 – 280 ms (25th Percentile): Casual desktop users; may be impacted by 60Hz display lag or fatigue.
  5. > 280 ms: Slow reaction or high hardware latency / Bluetooth input buffering.
Input SuiteCPS Speed

Clicks Per Second (CPS)

Benchmark single-click, butterfly, and jitter clicking speeds.

Input SuiteSub-ms Lag

Keyboard Latency Test

Measure switch debounce delay and keydown input lag.

FPS SuiteComparison

144Hz vs 240Hz Test

See how high refresh rates reduce motion blur and frame scan latency.

Hardware Knowledge Base

Frequently Asked Questions

Technical answers to common hardware, refresh rate, and browser diagnostic questions.

What is an average human reaction time?

The median human visual reaction time to a color stimulus is 200ms to 250ms. Competitive esports professionals and athletes often achieve visual reaction times between 150ms and 190ms.

Does monitor refresh rate (Hz) affect reaction time scores?

Yes. On a 60Hz monitor, a new frame is presented every 16.66ms, whereas a 240Hz monitor presents frames every 4.16ms. A high-refresh display reveals the green visual stimulus up to 12.5ms earlier, improving your score.

Why is audio reaction time faster than visual reaction time?

Auditory stimuli reach the brainstem in 8ms–10ms, while visual retinal phototransduction takes 20ms–40ms. Consequently, human auditory reaction times average 140ms–170ms, roughly 50ms faster than visual reactions.

How does mouse polling rate and input lag impact this test?

A 1000Hz or 8000Hz mouse registers your click within 0.125ms to 1.0ms of switch closure. Standard office mice at 125Hz introduce up to 8.0ms of polling latency.