Neurologist Jordan Grafman told Time magazine: “Kids that are instant messaging while doing homework, playing games online and watching TV, I predict, aren’t going to do well in the long run.” “I think this generation of kids is guinea pigs,” educational psychologist Jane Healy told the San Francisco Chronicle; she worries that they might become adults who engage in “very quick but very shallow thinking.” Or, as the novelist Walter Kirn suggests in a deft essay in The Atlantic, we might be headed for an “Attention-Deficit Recession.” … People who have achieved great things often credit for their success a finely honed skill for paying attention. When asked about his particular genius, Isaac Newton responded that if he had made any discoveries, it was “owing more to patient attention than to any other talent.” …

In The Principles of Psychology (1890), William James outlined the differences among “sensorial attention,” “intellectual attention,” “passive attention,” and the like, and noted the “gray chaotic indiscriminateness” of the minds of people who were incapable of paying attention. James compared our stream of thought to a river, and his observations presaged the cognitive “bottlenecks” described later by neurologists: “On the whole easy simple flowing predominates in it, the drift of things is with the pull of gravity, and effortless attention is the rule,” he wrote. “But at intervals an obstruction, a set-back, a log-jam occurs, stops the current, creates an eddy, and makes things temporarily move the other way.”

To James, steady attention was thus the default condition of a mature mind, an ordinary state undone only by perturbation. To readers a century later, that placid portrayal may seem alien—as though depicting a bygone world. Instead, today’s multitasking adult may find something more familiar in James’s description of the youthful mind: an “extreme mobility of the attention” that “makes the child seem to belong less to himself than to every object which happens to catch his notice.” For some people, James noted, this challenge is never overcome; such people only get their work done “in the interstices of their mind-wandering.” Like Chesterfield, James believed that the transition from youthful distraction to mature attention was in large part the result of personal mastery and discipline—and so was illustrative of character. “The faculty of voluntarily bringing back a wandering attention, over and over again,” he wrote, “is the very root of judgment, character, and will.”

Excerpts from Christine Rosen’s, “The Myth of Multitasking,” The New Atlantis, Number 20, Spring 2008.