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Under most conditions, the brain simply cannot do two complex tasks at the same time. It can happen only when the two tasks are both very simple and when they don’t compete with each other for the same mental resources. An example would be folding laundry and listening to the weather report on the radio. That’s fine. But listening to a lecture while texting, or doing homework and being on Facebook—each of these tasks is very demanding, and each of them uses the same area of the brain, the prefrontal cortex.”

Young people think they can perform two challenging tasks at once, Meyer acknowledges, but “they are deluded,

This ability to resist the lure of technology can be consciously cultivated

“The good thing about this phenomenon is that it’s a relatively discrete behavior that parents actually can do something about,” she says. “It would be hard to enforce a total ban on media multitasking, but parents can draw a line when it comes to homework and studying—telling their kids, ‘This is a time when you will concentrate on just one thing.’ ”

Stop fretting about how much they’re on Facebook. Don’t harass them about how much they play video games. The digital native boosters are right that this is the social and emotional world in which young people live. Just make sure when they’re doing schoolwork, the cell phones are silent, the video screens are dark, and that every last window is closed but one.

students performed equally well on a twenty-question multiple-choice comprehension test whether they had read a chapter on-screen or on paper. Given a second test one week later, the two groups’ performances were still indistinguishable.

“We cannot go backwards. As children move more toward an immersion in digital media, we have to figure out ways to read deeply there.”

Maybe her letter writers’ students weren’t victims of digitization so much as victims of insufficient training—and insufficient care—in the tools of managing a shifting landscape of reading and thinking.

In a new study, the introduction of an interactive annotation component helped improve comprehension and reading strategy use in a group of fifth graders. It turns out that they could read deeply. They just had to be taught how.

multitasking while reading on a computer or a tablet slowed readers down, but their comprehension remained unaffected.

Maybe the decline of deep reading isn’t due to reading skill atrophy but to the need to develop a very different sort of skill, that of teaching yourself to focus your attention.

Multitasking, or "continuous partial attention" as Linda Stone has called another form of attention-splitting, or "hyper attention" as N. Katherine Hayles has called another contemporary variant,2 are not necessarily bad alternatives to focused attention. It depends on what is happening in our own external and internal worlds at the moment.

As students become more aware of how they are directing their attention, I begin to emphasize the idea of using blogs and wikis as a means of connecting with their public voice and beginning to act with others in mind. Just because many students today are very good at learning and using online applications and at connecting and participating with friends and classmates via social media, that does not necessarily mean that they understand the implications of their participation within a much larger public.

ut how to participate in a way that's valuable to others as well as to yourself, I agree with Yochai Benkler, Henry Jenkins, and others that participating, even if it's no good and nobody cares, gives one a different sense of being in the world. When you participate, you become an active citizen rather than simply a passive consumer of what is sold to you, what is taught to you, and what your government wants you to believe. Simply participating is a start. (Note that I am not guaranteeing that having a sense of agency compels people to perform only true, good, and beautiful actions.)

I don't believe in the myth of the digital natives who are magically empowered and fluent in the use of social media simply because they carry laptops, they're never far from their phones, they're gamers, and they know how to use technologies. We are seeing a change in their participation in society—yet this does not mean that they automatically understand the rhetorics of participation, something that is particularly important for citizens.

Critical consumption, or what Ernest Hemingway called "crap detection," is the literacy of trying to figure out what and who is trustworthy—and what and who is not trustworthy—online. If you find people, whether you know them or not, who you can trust to be an authority on something or another, add them to your personal network. Consult them personally, consult what they've written, and consult their opinion about the subject.

Finally, crap detection takes us back, full circle, to the literacy of attention. When I assign my students to set up an RSS reader or a Twitter account, they panic. They ask how they are supposed to keep up with the overwhelming flood of information. I explain that social media is not a queue; it's a flow. An e-mail inbox is a queue, because we have to deal with each message in one way or another, even if we simply delete them. But no one can catch up on all 5,000 or so unread feeds in their RSS reader; no one can go back through all of the hundreds (or thousands) of tweets that were posted overnight. Using Twitter, one has to ask: "Do I pay attention to this? Do I click through? Do I open a tab and check it out later today? Do I bookmark it because I might be interested in the future?" We have to learn to sample the flow, and doing so involves knowing how to focus our attention.