Choice Reaction Time Test
Real decisions involve choosing. When the panel turns GREEN press A; when it turns BLUE press L. This choice reaction time test measures how quickly you decide and respond, and how accurate you are while doing it.
- Precise timingMeasured locally
- 10 attempts~2 min
- AnonymousNo sign-up
Your attempts
0 / 10
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False starts
0
Status
Ready
Your results
Complete 10 attempts to see your full results.
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Best
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Average (correct)
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Median
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Accuracy
How the choice reaction test works
- 1
Get in position
Left finger on A, right finger on L. On touch screens use the two buttons.
- 2
Start
Click the test area or press Space. Trials then run automatically.
- 3
Decide fast
GREEN → A, BLUE → L. Wrong keys count against accuracy.
- 4
Results
After 10 trials see accuracy and your average for correct responses.
About this test
A choice reaction time task has more than one possible stimulus, each with its own response. Because you have to identify the stimulus and select the right response, choice reactions are slower than simple reactions. Hick's law describes how decision time grows as the number of equally likely choices increases.
There's also a speed-accuracy trade-off: rushing tends to cause more errors. That's why we report accuracy alongside your average, and only correct responses count toward the timing statistics.
Scoring
- Average and median are calculated from correct responses only.
- Accuracy = correct responses ÷ all completed trials.
- Pressing before the colour appears is a false start and doesn't count as a trial.
Results are measured in your browser and include some device latency. Read the methodology and disclaimer.
Try other reaction tests
Frequently asked questions
What is a choice reaction time test?
Why is choice reaction time slower than simple reaction time?
Do wrong answers count?
Can I take it on a phone?
Related guides
All guides- Reaction Time vs Response Time: What's the Difference?Reaction time is how long it takes to start responding to a signal. Response time is the whole thing: reaction time plus the movement that follows. Here's the difference, with examples from tests, driving and gaming.
- What Is the Fastest Human Reaction Time?There's no official world record for reaction time, but research and sprint starts show where the human limit is. Sprinters can sometimes react to the gun in under 100 ms, while most people average around 200 ms or more.
- F1 Driver Reaction Time: How Fast Do Drivers React at the Start?Formula 1 drivers launch their cars about 0.2 seconds after the start lights go out, on average. Here's what that number includes, how drivers train for the start, and how your own time compares.
- How to Improve Your Aim: A Practical Guide for FPS PlayersBetter aim comes from consistent settings, good crosshair placement, short focused practice and enough sleep. Here's a practical routine for FPS games like PUBG, and how to measure your progress honestly.
Take the classic reaction time test
The original click-when-green test. Five attempts, instant results.