EveryMemoryStop Signal
Play the free Stop Signal test. Tap fast on GO arrows but hold back when the STOP signal flashes. A quick, fun check of your response inhibition.
⚡ Quick answer
Stop Signal is a free browser test where you respond fast to GO arrows but withhold your tap when a STOP signal appears shortly after. It exercises response inhibition, your ability to cancel an action already in motion. Your accuracy score is non-medical and self-relative - compare it only to your own best.
Key takeaways
- Tap fast on GO arrows but hold back when STOP flashes.
- Trains response inhibition - cancelling an action mid-motion.
- Free, in-browser, 30 trials, no sign-up; accuracy saved locally.
- It is not a diagnosis; compare only to your own best.
Starting a movement is easy; cancelling it once it has begun is one of the hardest things your brain does - that is exactly what the Stop Signal test measures.
Try it above: tap quickly when the arrow appears, but freeze when it flashes a red STOP border.
How to play
The test runs for 30 short trials and scores your accuracy as a percentage.
- Wait for the blue GO arrow, then tap the TAP button quickly.
- On about one in four trials, a red STOP border flashes after the arrow.
- On STOP trials, do not tap - hold back completely.
- Correct GO taps and correct STOP holds both count toward your score.
No sign-up is needed and your best accuracy stays saved on your device.
What it trains
This is a classic go/no-go style task focused on impulse control.
- Withholding a response you have already started
- Staying ready to act without acting too soon
- Balancing speed against self-control
To be honest, it mainly improves your performance on this task - fun practice, not a clinical measure of impulsivity.
A tip for a better score
The trap is tapping the instant you see the arrow - that leaves no room to cancel on STOP trials.
- Stay quick but not trigger-happy
- Keep a tiny buffer so you can still stop
- Accept that some STOP trials are nearly impossible to catch
The honest way to read your score
Your accuracy reflects this one session and how alert you are right now. Compare it only with your earlier runs.
If you like reaction challenges, try our reaction time test or read about attention span.
⚠ When to talk to a professional
The Stop Signal test is a casual game for fun and self-comparison, not a medical or diagnostic tool. It cannot assess ADHD, impulsivity, or any condition. Scores vary with rest, mood, and focus. For genuine concerns, please consult a qualified healthcare professional.
