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How large is an infant's vocabulary after 2 years?

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By the end of the second year, the infant's active vocabulary may reach 250 words. One of the key reasons infants can produce more sounds is the developing larynx, or voice box, which "descends" between the ages of 1 1/2 to 2 years. Thus, as the infant's vocal tract develops, the wider the range of sounds.

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Similar questions: Why can a 2 year old produce more sound than an infant at one year? What physical changes occur in an infant that affect speech and vocabulary development? [ Hide these questions ]

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