A discussion of the critical period hypothesis and its influence on first-language acquisition and second-language learning

Abstract

This paper analyzes some information about of the existence of a critical period for language acquisition/learning. Considering the process of language acquisition/learning as a fundamental one for the success of learners, this hypothesis takes into account the biological processes that happen during the acquisition of the first language and during the second language learning. By adopting a bibliographic review, this paper explores some studies by Lenneberg, from 1967 onwards. It is possible to acknowledge, despite the controversial feature of the topic, that this hypothesis affects the various language aspects independently and distinctly when considering first and second language.