Language Milestones
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Language develops in a predictable sequence of cooing, babbling, single words, two-word phrases, and full sentences.
Show
Recordings across dozens of languages place babbling near six months and first words near a year.
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The sequence is reliable and its timing varies widely. Deviation in timing is not deviation in order.