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Psycholinguistics
Wild Children and their stories
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Introduction
Isolated Children Chelsea
Isabelle
Helen
What Isabelle and Helen proved
Major factors governing language learning
Is there a critical age for first languagelearning?
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Chelsea
Aged 32 when discovered (Now 57) Not deaf, only partially hearing-impaired
With hearing aid and language instruction
Developed extensive vocabulary
Unable to make grammatically correctutterances (Lack word order)
Combing hair the boy
Banana the eat
FAILED REHABILITATION
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Isabelle
Aged 6.5 when discovered Confinement with mute mother
Mute mother:
Brain-damaged since 2
Never developed speech
Mother and Isabelle both locked in a room
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Isabelle
1 week after rehabilitation: First attempt of vocalization
3 months:
Producing sentenceutterances Thats my baby.
I dont want.
Close your eyes. 1 year:
Retell a story in own words
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Isabelle
1.5 Year: Complex structure of questions
Why does the paste come out if one upsets the jar?
2 Years: Produce full length sentences, intelligent
questioning
SUCCESSFUL REHABILITATION
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Helen
Aged 7 when discovered Born normal
Became deaf and blind
when 19 months old(Illness)
Had some degree of
language exposurebefore illness
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Helen
Bell(Inventor of telephone) and Macyhelpher with rehabilitation
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Helen
Hand signals with Bell Touch lips & vocal cords with Macy
Though unable to hear, able to producespeech
Strange, high pitched monotone
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Helen
Graduated fromHarvard University
Became a famouslecturer and writeraround the world
SUCCESSFULREHABILITATION
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Isabelle and Helen proved:
Language exposure ASAP Without exposure, children will not aquire
language
Can be in form of Speech
Signs
Writing Touch
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Major factors governing language learning
The ageexposureto language begins Helen exposed during first 19 months
Isabelle: Special case (No exposure until 6.5
years old)
Extend of trauma prior to exposure
(Psychological, physical, social) Both Helen & Isabelle did not have trauma
Helen: Lovely family
Isabelle: Affection of mother
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Critical age for first language learning
Critical Age Hypothesis: first few years of life is the crucialtime to
acquire first language (~6-7 years)
If presented with adequate stimuli Otherwisenever full command of language
especially grammatical systems
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Critical age for first language learning
Helen and Isabelle learned languageduring critical periodSucceeded
Victor, Genie, Chelsea, Oxana notFailed
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End
Thank You
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