By 12 months of age | - Does not use a variety of vowel and consonant sounds during vocalization
- Does not babble
- No turn-taking or sound imitation
- Does not request items by using a gesture+sound
- Does not follow simple directions with gestures
- No attempts to make words
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By 18 months of age | - Less than 10 word vocabulary
- Does not follow most directions
- Does not maintain eye contact during interactions
- Does not initiate verbal interactions
- Does not show an interest in looking at books
- Does not use (b,p,m,n,t,d,k,g) sounds
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By 2 years of age | - Less than 50 word vocabulary
- Using unintelligible speech
- Does not follow 2-step directions
- Does not understand approximately 200-300 words
- Does not use two-word phrases consistently
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By 3 years of age | - Not using approximately 80% intelligible speech
- Does not say approximately 500 words
- Does not understand approximately 900 words
- Does not use 3-4 word sentences
- Does not answer simple questions
- Does not ask simple questions
- Does not use (f,v) in words
- Repeats the first sounds of the words (b-b-b-ball)
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By 4 years of age | - Does not include (s,z,sh,ch,l,r) in words
- Does not maintain a conversation
- Does not use 4-5 word sentences
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By 5 years of age | - Not using most consonant sounds correctly and accurately
- Does not use 5-8 word sentences
- Does not tell a story
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