A Brief Comparison and Thought of the Mainstream Theories of SLA

Nativist theory of language acquisition centers on the existence of LAD/UG,for the fact that children can produce novel sentences that have never been heard.Environmentalist theories hold that an organism's experience is of greater signifi cance to the language development.Interactinists point out that neither the nativist nor the environmentalist theories are able to adequately account for SLA.The most comprehensive theory at present may be the interactionalist viewpoint,because it com bines previous theories with new ones to take into account innate and environmental influences as well as personal or cultural variables of language learners.