Research background
SLA research began as an interdisciplinary field, and because of this it is difficult to identify a precise starting date. However, two papers in particular are seen as instrumental to the development of the modern study of SLA: Pit Corder's 1967 essay The Significance of Learners' Errors, and Larry Selinker's 1972 article Interlanguage. The field saw a great deal of development in the following decades. Since the 1980s, second-language acquisition has been studied from a variety of disciplinary perspectives, and theoretical perspectives. Significant approaches in the field today are: systemic functional linguistics, socio-cultural theory, cognitive linguistics, Noam Chomsky's universal grammar, skill acquisition theory and connectionism.[6]