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Attention and impulse controlAbout a minute · 40 trialsFree · no sign-up

Go / No-Go Reaction Game

Respond as fast as you can to green circles and hold back on red squares. Free practice for the reaction and inhibition tasks used in game-based tests.

How to play

  1. Tap the target area (or press Space) as soon as a green circle appears.
  2. Do nothing when a red square appears.
  3. Most shapes are green, which builds a habit of responding. The skill is stopping in time.

What it measures

Go / No-Go tasks balance speed against control: reacting quickly to what matters while not reacting to what does not. Very fast responses with many false alarms read differently from slower, more careful ones.

Research basis: this game is our own implementation of the Go / No-Go task. Verbruggen & Logan (2008), Journal of Experimental Psychology: General, 137(4), 649–672. ↗

Tips to improve

  • Keep your eyes on the centre of the target area, not on your finger.
  • Aim for steady speed. A fraction of a second slower usually removes most false alarms.
  • After an error, reset and focus on the next shape. Do not slow right down.

Frequently asked questions

What counts as a good score?

High hit rate with few false alarms. On this practice version, catching over 90% of green circles while responding to fewer than 20% of red squares is a strong result.

Why are there so many green shapes?

Frequent targets make responding automatic, which is what makes stopping on the rare red shape a real test of control.

Does it work on a phone?

Yes. The target area responds to touch the moment your finger lands, so tap timings stay accurate.

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