This is because the brain has to switch back and forth to give each one attention, says Megan Moreno, an adolescent medicine physician who studies media and digital health at the University of Wisconsin–Madison. Over time, too much stimulation may be detrimental to your ability to concentrate on any one task. “We are in this world with lots of little micro interruptions,” Moreno says. “It is hard to piece together the stories, and it’s harder to retain them, because you have to do so much work to put them together.”
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