How Children Read Differently From Books vs. Screens - The New York Times

Naomi Baron, who is professor emerita of linguistics at American University and author of a new book, "How We Read Now: Strategic Choices for Print, Screen and Audio," said, "there are two components, the physical medium and the mind-set we bring to reading on that medium - and everything else sort of follows from that."

Because we use screens for social purposes and for amusement, we all - adults and children - get used to absorbing online material, much of which was designed to be read quickly and casually, without much effort. And then we tend to use that same approach to on-screen reading with harder material that we need to learn from, to slow down with, to absorb more carefully. A result can be that we don't give that material the right kind of attention.