I'm looking for more information for a research paper I've been working on. After finding about 20 sites, and one very interesting one yesterday (http://www.osnews.com/story.php?news_id=6282) I'm still short much of the meat of the paper.

Does anyone know of any good sites that references keyboard vs mouse (in terms of speed and/or throughput) or text vs graphical interfaces? I would love to find the results of an actual study done concerning typical OS-level tasks (file management and stuff like that) using the command line vs. the GUI.

Suggestions?

If anyone is interested, I'll be happy to share my bookmarks (and most likely the Bibliography). Thanks!