Overall, the study finds, the nation hasn't made a dent in its adult-literacy problem: From 1992 to 2003, it shows, the USA added about 23 million adults to its population; in that period, an estimated 3.6 million more joined the ranks of adults with low literacy skills.

A long-awaited federal study finds that an estimated 32 million adults in the USA — about one in seven — are saddled with such low literacy skills that it would be tough for them to read anything more challenging than a children's picture book or to understand a medication's side effects listed on a pill bottle.

Among the studies Greenfield analyzed was a classroom study showing that students who were given access to the Internet during class and were encouraged to use it during lectures did not process what the speaker said as well as students who did not have Internet access