Critical Periods and LanguageBiologically defined time window when experience is most effectiveEx: bird song, chick imprintingCP for language?Anecdotal evidence yesHow can we test this hypothesis?Lennenberg (1967)Recovery from LH damageKids better recovery from aphasiaLimitation: relearningJohnson and Newport: L1 Korean or Chinese & L2 EnglishIV: age of exposure (3-39 years)DV: grammatical judgmentsResults:Ages 3-7 were the same as nativesBig fall off at pubertyVariance increases with age alsoHuge spread as age increasesShows there are differences between people and why they are better at learning languageLimitation: already know a languageSo could there be no more room?Newport: CP for L1?Subjects: deaf adultsFirst exposed to ASL at age 0-25ASL primary languageTested in adulthood (age 60-70)Test: ASL grammar/morphologyThis shows there is something harder about warning a language with olderCase Study: GenieCould covey message but couldn’t use correct grammarNow lives in adult foster homeChild Psychology 560: Language Development (3) 03/04/2014Critical Periods and LanguageBiologically defined time window when experience is most effective -Ex: bird song, chick imprintingCP for language?-Anecdotal evidence yesoHow can we test this hypothesis?-Lennenberg (1967)oRecovery from LH damageKids better recovery from aphasiaoLimitation: relearning Johnson and Newport: L1 Korean or Chinese & L2 English -IV: age of exposure (3-39 years)-DV: grammatical judgments -Results: oAges 3-7 were the same as nativesBig fall off at puberty -Variance increases with age alsooHuge spread as age increasesShows there are differences between people and why they are better at learning languageoLimitation: already know a languageSo could there be no more room?-Newport: CP for L1?oSubjects: deaf adultsFirst exposed to ASL at age 0-25ASL primary languageTested in adulthood (age 60-70)oTest: ASL grammar/morphology oThis shows there is something harder about warning a language with olderCase Study: Genie-Could covey message but couldn’t use correct grammar-Now lives in adult foster
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