Critical period effects in second language learning: The influence of maturational state on the acquisition of English as a second language

@article{Johnson1989CriticalPE,
  title={Critical period effects in second language learning: The influence of maturational state on the acquisition of English as a second language},
  author={Jacqueline S. Johnson and Elissa L. Newport},
  journal={Cognitive Psychology},
  year={1989},
  volume={21},
  pages={60-99}
}
Lenneberg (1967) hypothesized that language could be acquired only within a critical period, extending from early infancy until puberty. In its basic form, the critical period hypothesis need only have consequences for first language acquisition. Nevertheless, it is essential to our understanding of the nature of the hypothesized critical period to determine whether or not it extends as well to second language acquisition. If so, it should be the case that young children are better second… Expand
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