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Critical Period Controversies For Second Language Acquisition: Implications For Language Teaching, Randy Lucio

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It was proposed by Eric Lenneberg (1967) in Biological Foundations of Language that implicit first language (L1) acquisition was only possible during a critical period (CP) spanning from infancy to puberty. The critical period hypothesis (CPH) has since been a topic of controversy among L1 and second language (L2) scholars, whose studies have produced varying results that argue for and against a CP. It is suggested in this paper, however, that these often-varying results offer important insight that can serve to inform current and future L2 educational policy and instruction within K-12 education in the U.S. Thus, it is imperative …