Reaction time
When the signal appears, press as fast as you can, and the time from the signal to your press is measured in milliseconds. The signal comes after an unpredictable wait of 2 to 8 seconds, and a press before it is a false start that costs the trial. The result is the median of several trials, compared only with other people who used the same input: touch, mouse or keyboard.
The moment the signal appears, press anywhere on the screen.
Keyboard: press Space when the signal appears. Esc goes back.
What counts as a false start?
A press before the signal, during the 2 to 8 second wait. A response under 100 ms also counts as a false start, because it is a guess, not a reaction to the signal. A trial with a false start is left out of your reaction time.
What is a lapse?
A response of 500 ms or more, or no response inside the window. Lapses are counted and shown with the result. The 500 ms line is the standard threshold of the psychomotor vigilance test (Basner and Dinges, Sleep, 2011).
Why are touch, mouse and keyboard compared separately?
A finger on glass, a mouse button and a key each add a different delay, so their times are different measurements. Your result is compared only with other people who used the same input, and the page says which pool it is.
What is an average reaction time?
This page does not publish an average until its own pool has enough results for your input mode and trial count. When it does, the comparison comes from that pool, not from a number typed into the page.
- Trials
- 0 / 7
- Active time
- 0:00
The moment the signal appears, press anywhere on the screen.
Round done
- Trials
- 0 / 7
- Active time
- 0:00
A response under 100 ms is a guess, not a reaction to the signal, so it is counted as an early press and left out of your reaction time.
This sends this round — score, settings, active time and task counts — to Studio AM with a random guest ID, and keeps sharing later rounds until you turn it off. No name, no individual answers, no drawings, and nothing from your earlier history.
Give feedback
Optional and off by default. Share starts, completions, replays and error categories with our team. No answers, drawings or names.
How this data is used