Keyboard latency probe

Keyboard latency probe

This web page is meant to test two aspects of your keyboard:

Its latency (through a reaction time test), and

Its tap duration distribution (through a paced tapping test).

The two types of test (reaction time and paced tapping) are<br>intermixed during the test. When starting the test, you will<br>first have a reaction time block, then a tapping block, then a<br>reaction time block again, until you've had seven blocks of<br>each. Each block takes about 30 seconds to finish, meaning the<br>total test time is 3.5 minutes.

When the test is done, please describe your keyboard setup and<br>then press Send to submit your results .

Multiple keyboards

If you have multiple keyboards (e.g. both external keyboard and<br>built-in laptop keyboard), or multiple ways of connecting<br>your keyboard (e.g. both USB and Bluetooth) I would greatly<br>appreciate if you run the test one time for each keyboard and<br>way to connect it. Do not mix keyboards within a test.

Reaction time test

The first test that runs is a reaction time test. When it<br>starts, the big rectangle will say "wait..." and then after a<br>random amount of time switch colour to green. When it does, you<br>are supposed to tap any key as quickly as possible.

Paced tapping test

The second test that runs is a paced tapping test. When it<br>starts, you will see a blinking yellow dot. Tap any key as<br>briefly as possible when the dot lights up. It is important that<br>you don't hold the key down, but just briefly tap it.

Technical issues

If you experience technical issues, or the instructions were<br>vague, feel free to restart the test. Send only the data from the<br>most successful run. I'm looking to test the abilities of your<br>keyboard, not you as a person.

Look at the rectangular area below and<br>click start.

[ look here ]

Start<br>Reset<br>Copy raw data

Test complete. Please describe the keyboard you used (e.g. "built-in laptop keyboard, ThinkPad X1", or "external mechanical, USB" or "Apple Magic Keyboard, Bluetooth"):

Send

Reaction time (stimulus → keydown), ms

Tap duration (keydown → keyup), ms