This undated handout photo provided by the Auditory Neuroscience Lab, Northwestern University, shows scalp electrodes to pick up how children's brains react to sounds such as speech in a noisy background. New research suggests it may be possible to predict which preschoolers will struggle to read, and it has to do with how they decipher speech when it's noisy. Northwestern University researchers analyzed brain waves of children as young as 3. (Auditory Neuroscience Lab, Northwestern University via AP)
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