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Beginning of language where infant coos and makes pleasant vowel sounds.
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Infant learns taking turns conversational patterns by playing peek-a-boo and patty cake with a caregiver.
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Infants begin to babble using vowels and consonants. Infant can comprehend few commonly used words by caregiver.
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Infant can focus on what the caregiver is focused on. Infant can play taking turn games and can trade roles with caregiver. Infant can use gestures to convey information and get a result.
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Toddler is able to say their first word, babble in intonation patterns of community, and can comprehend words faster.
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Toddler has a 250 word vocabulary and can combine two words.
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Child's vocabulary is increases rapidly, the child starts to understand sentence structure, broader word meanings, and pragmatics.
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Child has almost 10,000 word vocabulary, uses the correct grammar in sentences, and language has adapted to social expectations.
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Child has 40,000 words in their vocabulary, child can add time and transitions into conversational sentences, describe objects in detail, and can begin to be fluent in multiple languages.
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Child adds many abstract words to their vocabulary, can explain the definition of words abstractly, understands figurative language, masters cognitive self regulation, and can adapt language to social context.