Race start reaction test
F1 Reaction Test
Wait for the five red lights to go out, then react as fast as you can.
Start the test, then wait for all five lights to go out.
Click or press Space or Enter to play.
Feel the tension of a race start. Watch the five red lights, wait for them to go out, and measure how quickly you react.
How to play
Press the start area to begin. Five red lights will illuminate one by one, followed by a random pause. When every light goes out, click the area or press Space or Enter as quickly as you can. Pressing early counts as a false start; wait for the lights to go out and try again.
About your reaction time
Your result is the time between the lights going out and your response. Display refresh rate, browser, device, and input hardware can all affect the measurement, so use it as a casual practice test rather than a clinical assessment.