What the reaction time test measures
The time between the box turning green and your click is your reaction time: how long it takes to see the change, decide and move your finger. The delay before green is random, so you cannot time it, and clicking early does not count. Five rounds are averaged because a single round is easily thrown off by a blink.
What is a normal reaction time?
For a visual test like this, many people land somewhere around 200 to 300 milliseconds. Your number also includes delays that are not you: your screen takes time to show the green, and your mouse and computer take time to report the click. A fast gaming monitor and mouse can shave tens of milliseconds off, so compare scores on the same setup.
How to improve your reaction time
- Rest your finger on the button. Lifting the finger first adds a lot of time.
- Look at the centre of the box. You see colour changes fastest where you are looking.
- Sleep and warm up. Reaction time gets worse when you are tired. A few warm-up rounds help.
