EFFECT OF CRITICAL PERIOD ON SECOND LANGUAGE ACQUISATION

This article is argues about the effect of critical period to the learners second language acquisition.  In the article by considering the theory of Critical age hypothesis, related hypothesis are discussed and collected data support the ideas of founders of CPH theory (Lenneberg, Penfield, Johnson) that language is learned well in specific period of human's life as the hemispheres of the brain that promotes language learning ability function appropriately until puberty period which begins approximately from the age of two and continues till thirteen