"Dyslexia, in which the mind scrambles letters or stumbles over text, is twice as prevalent in the U.S., where it affects about 10 million children, as in Italy, where the written word more closely corresponds to its spoken sound. "Dyslexia exists only because we invented reading," said Tufts University cognitive neuroscientist Maryanne Wolf, author of "Proust and the Squid: The Story and Science of the Reading Brain."
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