Reflex Test

Reflex Test measures one thing very precisely: how quickly you react. The screen turns red and asks you to wait. After a random pause it turns green — tap as fast as you can, and your reaction time appears in milliseconds.

The test runs for five rounds and reports your average and your best. Tapping before the green screen does not count and the round is repeated. Most people land somewhere between 250 and 400 milliseconds; a touch screen or a wireless mouse can add a little delay of its own.

Wait for green, then react. After five valid rounds you get your average reaction time. Lower is better.