Second Language Acquisition

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Second-language acquisition or second-language learning is the process by which people learn a second language. Second-language acquisition (often abbreviated to SLA) is also the name of the scientific discipline devoted to studying that process. Second language refers to any language learned in addition to a person's first language; although the concept is named second language acquisition, it can also incorporate the learning of third, fourth or subsequent languages.[1] Second-language acquisition refers to what learners do; it does not refer to practices in language teaching. The academic discipline of second-language acquisition is a sub-discipline of applied linguistics. It is broad-based and relatively new. As well as the various branches of linguistics, second-language acquisition is also closely related to psychology, cognitive psychology, and education. To separate the academic discipline from the learning process itself, the terms second-language acquisition research, second-language studies, and second-language acquisition studies are also used. SLA research began as an interdisciplinary field, and because of this it is difficult to identify a precise starting date. However, it does appear to have developed a great deal since the mid-1960s.[2] The term acquisition was originally used to emphasize the subconscious nature of the learning process,[3] but in recent years learning and acquisition have become largely synonymous. Second-language acquisition can incorporate heritage language learning,[4] but it does not usually incorporate bilingualism. Most SLA researchers see bilingualism as being the end result of learning a language, not the process itself, and see the term as referring to native-like fluency. Writers in fields such as education and psychology, however, often use bilingualism loosely to refer to all forms of multilingualism.[5]
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