Some people suspect that a multitasking lifestyle has changed how they think, leaving them easily distracted and unable to concentrate even when separated from computers and phones. Their uneasiness may be justified.
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In several benchmark tests of focus, college students who routinely juggle many flows of information, bouncing from e-mail to web text to video to chat to phone calls, fared significantly worse than their low-multitasking peers.
Other studies have focused on multitasking’s immediate effects — children doing worse on homework while watching television, office workers being more productive when not checking email every five minutes.
“We wanted to ask a different question,” said Clifford Nass, a Stanford University cognitive scientist. “What happens to people who multitasking all the time?”
In a study published Monday in the Proceedings of the National Academy of Sciences, Nass and Stanford psychologists Anthony Wagner and Eyal Ophir surveyed 262 students on their media consumption habits. The 19 students who multitasked the most and 22 who multitasked least then took two computer-based tests, each completed while concentrating only on the task at hand.
The more you multitask, the more the brain rewards you. The more you multitask, the tasks that you are doing degrades.