In 1989, Bruce "Tog" Tognazzini described results of Apple Computer's research into mouse efficiency:
We discovered, among other things, two pertinent facts:
- The stopwatch consistently proves mousing is faster than keyboarding.
- Test subjects consistently report that keyboarding is faster than mousing.
Keyboard zealots rebelled so strongly against this conclusion that Tog felt compelled to publish two follow-up articles, in which he described a specific test:
Using Microsoft Word on a Macintosh, I typed in a paragraph of text, then replaced every instance of an "e" with a vertical bar (|). The test subject's task was to replace every | with an "e." Just to make it even harder, the test subjects, when using the mouse, were forbidden to just drop the cursor to the right of the | and then use the delete key to get rid of it. Instead, they had to actually drag the mouse pointer across the one-pixel width of the character to select it, then press the "e" key to replace it
This page lets you test yourself.
By Josiah Ulfers, 2012. Text from Bacon ipsum.
Public domain or the closest thing to it.