During the first year of life the infant can learn any language,but after the first year the infant is primed to learn only the language to which he or she is exposed to daily.

Question

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This is known as the critical period hypothesis and is supported by research in developmental psychology. After the first year of life, the brain becomes less flexible and it becomes harder for the child to learn new languages in the same way as they did during their first year. However, it is still possible for children to learn additional languages after their first year of life with exposure and practice.

During the First Year of Life the Infant Can Learn