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Birth - 3 months
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Startles or jumps when there is a sudden sound.
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Stirs, wakes or cries when someone talks or makes a noise.
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Recognizes your voice and quiets when you speak.
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3 - 6 months
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Turns eyes towards interesting sounds.
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Appears to listen.
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Turns head to search for source of a voice.
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Awakes easily to sounds.
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Anticipates feeding by hearing familiar sounds (rattling
of bottles, pots and pans, etc.).
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Enjoys rattles and noise-making toys.
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6 - 12 months
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Reacts to music by cooing.
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Responds to own name.
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Turns head towards soft sounds.
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Looks to correct person when words "mommy" or "daddy" are
said.
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Understands "no" and "bye-bye."
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Begins to imitate speech sounds (babbles).
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12-15 months
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Says first words, such as "Da-Da, "Ma-Ma" or "bye-bye."
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Knows names of favorite toys and can point to them when asked.
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Likes rhymes and jingles.
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15-20 months
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Can follow simple directions ("put the block in the box").
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Recognizes body parts when named (hair, mouth, nose, etc.).
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Asks for wants by naming "milk," "cookie," etc.
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Speaks 10-20 words.
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20-24 months
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Begins combining words such as "go bye bye car" and "juice
all gone."
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Refers to self by name.
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Enjoys being read to.
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Shows interest in the sounds of radio and television.
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24-36 months
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At 24 months, speaks about 270 words with a very fast daily
rate of increase in vocabulary.
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Child wants to communicate and tell experiences.
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Is frustrated if adults don't understand.
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By age 3, vocabulary equals about 1000 words, 80% of which
are intelligible even to strangers. It is common for some sounds
to be mispronounced (such as "l," "r," and "th").
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