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I need help writing a note on Age Differences in Second Language Aquisition.

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In The age factor in second language acquisition: a critical look at the Critical Period Hypothesis, Singleton and Lengyel (1995) make an argument against the "Critical Period" Hypothesis proposed by Wilder Penfield. In Penfield's hypothesis, the first years of life are the most optimal for first language acquisition and that by the time of puberty, neuroplasticity is no longer viable for the acquisition of new grammatical or syntactical systems. Therefore, all learning (language learning) should occur at the earliest stages of development for it to be mastered at all.

The criticism to this hypothesis comes from the fact that a) there is not enough scientific evidence that supports this...

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