Describe the vocabulary spurt and typical age range for its onset.

Describe the vocabulary spurt and typical age range for its onset.

• A. A rapid explosion in productive vocabulary; typically around 18–24 months.
• B. A slow accumulation of words across years.
• C. A decline in expressive vocabulary.
• D. A sudden focus on reading.

Answer: (A)

The vocabulary spurt is a rapid increase in a child’s productive vocabulary, where they quickly learn and begin using many new words. This surge typically starts around 18 to 24 months, though there is natural variation and some children may begin a bit earlier or later. Before this point, vocabulary tends to grow more slowly, and after the spurt the rate of word learning accelerates as children expand their expressive lexicon and start combining words to form short phrases. This pattern reflects a shift from mostly recognizing words to actively producing a large number of them, driven by mechanisms like fast mapping and increased linguistic exposure. The onset around 18–24 months is the classic window clinicians and researchers highlight for this rapid growth. The other descriptions don’t fit typical early vocabulary trajectories: a slow, years-long accumulation doesn’t capture the sudden acceleration; a decline in expressive vocabulary isn’t part of normal development; and a sudden focus on reading occurs much later and isn’t about infants' or toddlers’ spoken vocabulary growth.

The vocabulary spurt is a rapid increase in a child’s productive vocabulary, where they quickly learn and begin using many new words. This surge typically starts around 18 to 24 months, though there is natural variation and some children may begin a bit earlier or later. Before this point, vocabulary tends to grow more slowly, and after the spurt the rate of word learning accelerates as children expand their expressive lexicon and start combining words to form short phrases. This pattern reflects a shift from mostly recognizing words to actively producing a large number of them, driven by mechanisms like fast mapping and increased linguistic exposure. The onset around 18–24 months is the classic window clinicians and researchers highlight for this rapid growth. The other descriptions don’t fit typical early vocabulary trajectories: a slow, years-long accumulation doesn’t capture the sudden acceleration; a decline in expressive vocabulary isn’t part of normal development; and a sudden focus on reading occurs much later and isn’t about infants' or toddlers’ spoken vocabulary growth.