Second language acquisition

The term second language acquisition refers to the processes through which someone acquires one or more second or foreign languages.SlA reasearchersook at acquisition in naturalistic contexts and in classroom settings.researchers are interested in both product.
A major shift in perspective occurred in the 1960s, when linguists and language educators turned their attention from the CA of languages and began studying the specific language learners used as they attempted to communicate in the target language.In an important publication corder (1967) made a strong case for the investigation of learners' errors as a way of obtaining insights into th processes amd strategies underlying SlA.Errors were seen not as evidence of pathology on the part of learners , but as a normal and healthy part of the learning process.
During the early 1970s a series of empirical investigations in to learners language were carried out which became known as the morpheme order' studies.
these researchers argue that items can only be learned when they are one stage ahead of a learners present processing capacity.this is called the ' teachability ' hypothesis.
SLA conscious learning and sub conscious. acquisition.
According to krashen 1982 1988 when using the language to communicate meaning the learner must draw on subconscious knowledge.the suggestion of conscious and subconscious process functioning in language devlopmemt was not new or radical ; however krashen 's assertion that these processes were totally separate.
A major challenge for curriculum designers materials writers and classroom practitioners who subscribe to task -based teaching is how to develop programmes that integrate tasks with form focused instruction.