language

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A team led by Professor Christine Moon of Pacific Lutheran University, tested newborn babies in Tacoma and Stockholm, Sweden. Moon said they played recordings of a distinctly American English vowel sound and a Swedish one, and tested the babies responses by measuring the one thing a day-old baby is really good at: sucking on a pacifier. Their sucking patterns reveal that babies show a familiarity with the vowel sounds of their mother tongue even at birth, suggesting they’ve been listening carefully in utero.