Don’t blink. How fast do you react?
Wait for Go. Tap. Five valid taps make one very honest number, in milliseconds.
No account needed. Takes five taps, plus the waiting.
In the real test
- Five valid trials make your result.
- Press before Go and that try doesn’t count.
What’s in the number
Not just your thumb.
Every link counts.
From the moment Go is drawn to the moment the browser writes down your press, a few things take their turn. All of them land in your milliseconds.
- 01 The screen draws the Go
- 02 You spot it
- 03 Your finger presses
- 04 Mouse, key or touch sends it on
- 05 The browser stamps the time
Display, browser and input-device latency are part of the measurement. This is not a clinical attention measure or an intelligence score.
Comparing two tries? Same device, same setup.
How to play, and what you get
Five taps.
One middle number.
The test keeps going until it has five valid trials. Your result is the median, the middle of the five, plus every single trial.
- 1 Wait for Go
The signal switches from Wait to Go after a pause that changes each time.
- 2 Press the signal or Space
Whichever feels natural. Stick with the same one.
- 3 Jumped the gun?
Early presses and interruptions are excluded. Just go again.
Example numbers, not a benchmark.
The honest part
Fast is fun.
It isn’t everything.
Display, browser and input-device latency are part of the measurement. This is not a clinical attention measure or an intelligence score.
Not an attention test
It times five taps. It can’t tell you anything clinical about focus.
Not an intelligence score
Quick fingers and clever thinking are different things.
Your gear plays too
Screen, browser and input device all sit inside the number.
How is it timed?
Browser-based visual reaction-time task using performance.now().
What if I get distracted mid-trial?
If the page is hidden or the timing falls outside the window, that trial is marked interrupted and you simply run it again. Only valid trials count toward your five.
Five taps.
Ready?
5 valid trials · Median in ms · Free · No account needed