Stage One: Vegetative Features: sounds and reflexive actions Age: 0 - 4 months
Stage Two: Cooing Features: vocal play, laughing, pitch, vowels + consonantsAge: 4 - 7 months
Stage Three: BabblingFeatures: repeated patterns of vowels and consonants Age: 6 - 12 months
Stage Four: Proto-WordsFeatures: vocalisations used repeatedly with the same meanings Age: 9 - 12 months
Stage Five: Holophrastic Features: one word utterances Age: 12- 18 months
Stage Six: Two Word Features: combinations of two words Age: 18- 24
Stage Seven: Telegraphic Features: three or more words combined Age: 24 - 36 months
Stage Eight: Post Telegraphic Features: more complex grammar and phrases Age: 36 months +
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