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Birth
This will be our hypothetical birthday for the child in question! -
Cooing
At approximately two months of age, babies will start making cooing noises in response to social stimuli and mimicking basic social turn taking (Berk, 2014, 235). -
Babbling
At approximately six months of age, babies will start babbling with consonant sounds, continue with turn-taking, and begin to comprehend very basic words (Berk, 2014, 235). -
Pre-verbal gestures
Eight to twelve months within their life, babies will begin consciously making pre-verbal gestures to engage with adults ie. pointing and clapping (Berk, 2014, 235). -
First Word
At approximately one year of age, babies will start mimicking more complex sound and intonation patterns. They can be expected to day their first word (Berk, 2014, 235). -
Rapid Vocabulary Expansion
Between approximately 18-24 months of age, a toddler's vocabularly can be expected to rapidly expand from fifty words to 250 words. Toddlers begin speaking in two word combinations (Berk, 2014, 236). -
End of Early Sensitive Period
At around two years of age, the early sensitive period for speech, language development ends, and children who have a hearing impairment who have not yet received a cochlear implant or other supportive technology will have permanent developmental delays. -
Severe Developmental Delay
After age four, children with significant hearing impairment who have not yet received treatment and assistive technology will have severe, persistent delays in speech language development (Berk, 2014, 235). -
End of Pre-School
By the end of pre-school, children undergo rapid grammatical development and can apply most grammar rules correctly, though they may still engage in over-generalization when learning about exceptional cases (Berk, 2014). -
Meta-linguistic Awareness
As children move into middle childhood they develop meta-linguistic awareness. They are now able to actively decode language, understand that it has rules, and consciously adjust them over time. Vocabularly develops rapidly in correlation with exposure (Berk, 2014, 455).