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.