Measure your reflexes in milliseconds
Tap the box to start. It turns red – wait. After a random pause it turns green: tap or click as fast as you can. The test measures the time between the colour change and your tap. After five attempts you see your average, your best try and your personal record.
Most people react to a visual signal in about 200–300 milliseconds. Your result also depends on your device: screens and touch panels add a small delay, so compare scores on the same device. Tap too early and the attempt doesn’t count – no guessing!
How to use
- Tap the blue box (or press Space) to start.
- Wait while it is red – don’t tap yet.
- The moment it turns green, tap as fast as you can.
- Repeat five times to see your average and best time.
Ideas for using it
- Friends challenge. pass the phone round – lowest average wins.
- Warm-up. a quick reflex check before gaming or sport.
- Classroom. a fun way to talk about reflexes and the nervous system.
- Morning check. are you awake yet? Compare with your record.