Instead of reading an entire news article, watching an entire television show or listening to an entire speech, growing numbers of people are happy to jump to the summary, the video clip, the sound bite — never mind if context and nuance are lost in the process; never mind if it’s our emotions, more than our sense of reason, that are engaged; never mind if statements haven’t been properly vetted and sourced.

And online research enables scholars to power-search for nuggets of information that might support their theses, saving them the time of wading through stacks of material that might prove marginal but that might have also prompted them to reconsider or refine their original thinking.

Digital insiders like Mr. Lanier and Paulina Borsook, the author of the book “Cyberselfish,” have noted the easily distracted, adolescent quality of much of cyberculture. Ms. Borsook describes tech-heads as having “an angry adolescent view of all authority as the Pig Parent,” writing that even older digerati want to think of themselves as “having an Inner Bike Messenger.”

authors “will increasingly tailor their work to a milieu that the writer Caleb Crain describes as ‘groupiness,’ where people read mainly ‘for the sake of a feeling of belonging’ rather than for personal enlightenment or amusement. As social concerns override literary ones, writers seem fated to eschew virtuosity and experimentation in favor of a bland but immediately accessible style.

However impossible it is to think of “Jon & Kate Plus Eight” or “Jersey Shore” as art, reality shows have taken over wide swaths of television,