The question of how humans process the flood of electronic media was a central part of the work of Stanford University sociology professor Clifford Nass, who died recently. Citing multiple studies, Nass said people often overestimate their ability to multitask. hide caption

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Strenuous mental exercise like reading difficult books, solving tricky math problems — or, maybe, playing the right video game — can help keep a healthy brain sharp, research suggests. hide caption

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A Kansas City family prepares a meal together. A new study finds that working mothers log more hours — and get more stressed — than working fathers while multitasking at home. (This family wasn't part of the research.) Allison Long/MCT /Landov hide caption

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