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LESSON 6: Age characteristics in learning a foreign language. types of comparison and comparison; age hypothesis; bilingualism



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ЧТЎИК мажмуа 2 курс 2020

LESSON 6: Age characteristics in learning a foreign language. types of comparison and comparison; age hypothesis; bilingualism.


Aims: to introduce students with the term


Objectives:

  • to discuss the ways of avoiding errors

  • help students improve their accuracy

A biologically determined period of life when language can be acquired. The critical period hypothesis claims that there is such a biological timetable. Initially, the notion of a critical period was connected only to first language acquisition. Pathological studies of children who acquired their first language, or aspects thereof, became fuel for arguments of biologically determined predispositions, timed for release, which would wane if the correct environmental stimuli were not present at the crucial stage.


The "classic" argument is that a critical point for second language acquisition occurs around puberty, beyond which people seem to be relatively incapable of acquiring a nativelike accent of the second language. This has led some to assume, incorrectly, that by the age of 12 or 13 you are "over the hill" when it comes to the possibility of successful second language learning. In order to examine these issues we will look at neurological and psychomotor considerations first; these will then followed by an examination
of cognitive, affective, and linguisticconsiderations.
Neurological Considerations
One of the most interesting areas of inquiry in second language acquisition has been study of the function of the brain in the process of acquisition. There is evidence in neurological research that as the human brain matures certain functions are assigned - or "lateralized" - to the left hemisphere of the brain and certain other functions to the right hemisphere. Intellectual, logical, and analytical functions appear to be largely located in the left hemisphere while the right hemisphere controls functions related to emotional and social needs. Language functionappear to be controlled mainly in the left hemisphere, though there is a good deal of conflicting evidence.
While question about how language is lateralized in the brain are interesting indeed, a more crucial question for second language researchers has centered on when lateralization takes place, and how that lateralaziation process affects language acquisition. Eric Lenneberg(1967) and others suggested that lateralization is a slow process that begins around the age of 2 and is completed around poberty. During this time the child is neurologically assigning functions little by little to one side of the brain or the other; included in these functions, of course, islanguage. And it has been found that children up to the age of puberty who suffer injury to the left hemisphere are able to relocalize linguistic functions to the right hemisphere, to "relearn" their first language with relatively little impairment. Thomas Scovel(1969) extended these findings to propose a relationship between lateralization and second langauge acquisition. He suggested that the plasticity of the brain prior to puberty enables children to acquire not only their first language but also a second language, and the possibilty it is the very accomplishment of lateralziation that makes it difficult for people to be able ever again to easily acquire fluent control of a second language, or at least to acquire it with Alexander Guiora et al.(1972a) call "authentic" (nativelike) pronunciation.
While Lenneberg(1976) contended that lateralization is complete around puberty, Norman Geschwind(1970), among others, suggested a much earlier age. Stephen Krashen(1973) believed that the development of lateralization may be complete around age 5. Krashen's suggestion does not grossly conflict with research on first language acquisition if one considers "fluency" in the first language to be achieved by age 5.Scovel(1984:1) cautioned against asssuming with Krashen, that lateralization is complete by age 5. "One must be careful to distinguish between 'emergence' of lateralization (at birth, but quite evident at 5) and 'completion' (only evident at about puberty)." If lateralization is not completed until puberty, then one can still construct arguments for a critical period based on lateralization.
Obler (1981:58) notes that in second language learning there is significant right hemisphere participation and that "this participation is particularly active during the early stages of learning the second language."Genesee(1982:321) concluded that "there may be greater right hemisphere involvement in language processing in bilinguals who acquire their second language late relative to their first language and in bilinguals who learn it in informal contexts."

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