... 'The Shallows': This Is Your Brain Online. (Hat tip, Dave Lull.)
Try reading a book while doing a crossword puzzle, and that, says author Nicholas Carr, is what you're doing every time you use the Internet.
What a ridiculous analogy, if only because no one would try to do a crossword puzzle while reading a book, since it would involve, not interrupting what you are doing, but doing something else. I do not interrupt my reading to go online -- except if something I read prompts a question that I would answered before proceeding. But then I might put down a book for a couple of minutes in order to look up a word I wasn't sure about. One of the reasons my blogging has been spotty lately -- and also why I'm behind in my email -- is because I have been reading a lot, and doing some writing as well. Carr's is another Gladwell-style book -- i.e., one in which a gimmick is presented as an idea by surrounding it with all kinds of supporting factoids. That sort of thing is a bigger waste of your mental powers than surfing the net.