At Wired.com, author Nicholas Carr asserts that “The Web Shatters Focus, Rewires Brains”:
The Internet is an interruption system. It seizes our attention only to scramble it. There’s the problem of hypertext and the many different kinds of media coming at us simultaneously. There’s also the fact that numerous studies—including one that tracked eye movement, one that surveyed people, and even one that examined the habits displayed by users of two academic databases—show that we start to read faster and less thoroughly as soon as we go online. Plus, the Internet has a hundred ways of distracting us from our onscreen reading. Most email applications check automatically for new messages every five or 10 minutes, and people routinely click the Check for New Mail button even more frequently. Office workers often glance at their inbox 30 to 40 times an hour. Since each glance breaks our concentration and burdens our working memory, the cognitive penalty can be severe.
The penalty is amplified by what brain scientists call switching costs. Every time we shift our attention, the brain has to reorient itself, further taxing our mental resources. Many studies have shown that switching between just two tasks can add substantially to our cognitive load, impeding our thinking and increasing the likelihood that we’ll overlook or misinterpret important information. On the Internet, where we generally juggle several tasks, the switching costs pile ever higher.
The whole piece, which is well worth a read, is based on Carr’s new book, The Shallows: What the Internet Is Doing to Your Brain—the one mentioned in this recent post.
Could I be more self-conscious about including those hyperlinks? 😉