Eighteen-month-old Gavin has just learned 10 new words in the past week. This brings his total vocabulary to 30 words. Gavin is best described as

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Gavin's sudden acquisition of 10 new words in one week suggests he is experiencing a vocabulary spurt. This is a normal part of language development, where children rapidly acquire new words and start putting them together into simple sentences. Babbling refers to the early vocalizations of infants, which do not yet have meaning. Overextension is when a child applies a word too broadly, such as calling all four-legged animals "doggie." Metalinguistic awareness is the ability to think about and understand language as a system, which usually develops in later childhood.

Eighteen-Month-Old Gavin Has Just Learned 10 New Words in the Past