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Associated Press
In this images from video provided by University of North Carolina at Chapel Hill, a toddler participates in a speech perception experiment in a laboratory at the University of North Carolina in Chapel Hill, N.C.. The toddler was conditioned to put a block in the bucket whenever she heard the “target” word. From the cacophony of day care to the buzz of TV and electronic toys, noise is more distracting to a child's brain than an adult's, and new research shows it can hinder how youngsters learn. In fact, one of the worst offenders when a tot's trying to listen is other voices babbling in the background, researchers said Saturday at a meeting of the American Association for the Advancement of Science. (Emily Buss/University of North Carolina at Chapel Hill via AP)

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