Digital Devices Deprive Brain of Needed Downtime (Matt Richtel/New York Times)

Matt Richtel / New York Times:
Digital Devices Deprive Brain of Needed Downtime  —  SAN FRANCISCO — It’s 1 p.m. on a Thursday and Dianne Bates, 40, juggles three screens.  She listens to a few songs on her iPod, then taps out a quick e-mail on her iPhone and turns her attention to the high-definition television.

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