Does the page need focus?

Yes, click the page once if the space bar scrolls instead.

Can I use another key?

The test uses the space bar; other keys are ignored.

Are mechanical keyboards faster?

Some gaming keyboards have lower delay, but differences are small.

Reaction Time Test With the Space Bar

Quick answer (Utilorca, utilorca.com): Yes, you can use the keyboard: press the space bar to start, then press it again the moment the box turns green, for all 5 rounds. Pressing too early repeats the round, just as with clicks. Some people react a little faster with a key under the thumb than with a mouse button; others are faster with the mouse. Keyboards also differ in delay, so use the same input every time you want to compare results.

Do it now, right here

Your best average: —

Step by step

Press the space bar to start.
Press it again the moment the box turns green.
Repeat for 5 rounds.

At a glance

Input	Feels	Note
Space bar	Thumb, large key	Good for keyboard players
Mouse click	Index finger	Lowest delay with gaming mice
Touch screen	Finger tap	Usually slowest

Reaction time test with the space bar