Game Time Fun Time

REACTION LAB

Five ways to test your reflexes. No login, no download β€” just react.
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Results are measured in-browser with performance.now(). Device, display refresh rate, browser, and input hardware can all affect the result.
Reaction Lab

CHOICE REACTION TEST

React to the matching A, S, D or F signal as quickly as possible.
GO COLOUR
CHOOSE YOUR TARGET
HOW MANY TARGETS?
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TAP TO START
The delay is random, so guessing won't help.
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Decision + reflex challenge

Choice reaction time test

The Choice Reaction Test adds a decision to a normal reaction game. Instead of reacting to one universal GO signal, you must identify which of four cues appears and respond with the matching A, S, D or F input.

The round contains eight signals. Fast responses help, but pressing the wrong choice also matters, so the results include both reaction timing and accuracy information.

How to play

  1. Start the round and wait for a signal.
  2. Identify the highlighted A, S, D or F cue.
  3. Press the matching key or tap the matching button.
  4. Repeat through all eight signals.
  5. Review average reaction and accuracy at the end.

Why it feels different from Classic

In Classic Reaction, you only need to detect that the GO state appeared. Choice Reaction asks you to detect the cue, identify which option it represents, and then make the matching response.

Speed is only half the challenge

Trying to react before you have identified the cue can turn a fast attempt into a wrong one. The best personal runs balance quick responses with clean choices. Use the same keyboard or touchscreen setup if you want to compare sessions fairly.

Choice reaction FAQ

How many signals are in a round?

Each Choice Reaction round uses eight signals.

Which keys does the game use?

The keyboard inputs are A, S, D and F. On touch devices, you can tap the matching on-screen button instead.

Does the game measure accuracy?

Yes. The results screen reports the percentage of correct responses alongside reaction timing.

What should I play if I only want one reaction score?

Use Classic Reaction Time Test for a simpler single-cue visual reaction.

Reaction Lab

RESULTS

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Average reaction
Animal comparison
A fun rough comparison β€” animal experiments use different senses and tasks, so these aren't like-for-like reaction tests.
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