Visual Reflex Test: React or Wait

How to take the reflex test

1. Start the test and keep the test area focused. Wait through the neutral screen.
2. Respond once when you see green and the word GO. Use a click, tap, Space, or Enter.
3. When blue WAIT appears, do nothing. A correct wait lasts for the full one-second signal window.
4. Release your key or finger between rounds. Complete all 20 rounds: 12 green signals and 8 blue signals in shuffled order.

Read accuracy before speed

A correct green response is a hit; not responding within one second is a miss. Pressing on blue is a false alarm. Pressing before a signal is an early response and consumes that round. Withholding your response on blue is a correct wait.

The average time includes correct green hits only. If you miss every green signal, there is no hit-time average to report. Fast guesses with many mistakes do not indicate better performance. Compare both correct responses out of 20 and your correct-hit time across runs.

What does an online reflex test measure?

This is a visual go/no-go response task: you must recognize a signal and decide whether to respond. It differs from a simple test in which every signal means click. The word “reflex” here describes an everyday reaction exercise; this is not a clinical examination of involuntary reflexes.

For a simpler baseline, use the five-round reaction speed test. Read the average reaction time guide before comparing results from different tasks.

Practice on a consistent setup

The exercise runs in your browser and does not require an account. These practice results are held in memory and reset when you leave or refresh. Switching away or hiding the window stops an active run. Display and input latency remain part of your measured time, so keep the same setup when comparing sessions.

The response clock uses performance.now() after the signal is committed to the page. This cannot detect the instant that your physical screen displays the signal. See how timing and privacy work.