Genie was a girl who endured abusive and neglectful conditions and was deprived of language exposure until she was rescued at age 13. Despite remediation, Genie was unable to learn to speak fluently. Historically, this case study was used to demonstrate the effects of:.
a. temperament
b. critical periods
c. linguistic determinism
d. self-fulfilling prophecies
e. cognitive dissonance

b. critical periods

Explanation:

A critical period is a specific period in development during which an organism is most vulnerable to the deprivation or absence of certain environmental stimuli or experiences.

In language learning, there is a deuduction that for one to successful learning any language, there are required exposure to the relevant language during childhood. The theory states, that it is likely that humans find it hard to construct a complete mental grammar of any language if the person started learning as an adult.

Genie being locked up, and subjected to neglect and abuse till she was rescued at 13. Her inability to speak fluently can be attributed to her critical condition of years back which now led to inability to learn fluency of speech as an adult.

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