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Summary of "Critical period effects in second language learning - The influence of maturational state on the acquisition of English as a second language", by Jacqueline S. Johnson and Elissa L. Newport,
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1 Psychology of Human Development 3054, Section 5014F 19 October 2001 Summary of "Critical Period Effects in Second Language Learning: The Influence of Maturational State on the Acquisition of English as A Second Language", by Jacqueline S. Johnson and Elissa L. Newport, Published by Cognitive Psychology in 1989, pages 60-99. The original paper attempts to focus on whether or not the ability to adopt a second language, namely English, also lies within a certain designated period which defines the period for first language acquirement as well. Johnson and Newport attempted to modify Lenneberg's definition of the original critical period (mentioned below) into two versions: "The exercise hypothesis and The maturational state hypothesis". The first version implies that the attainment of a native language needs to be rehearsed during a period in early life and the ability will decrease with age. However, once this has been accomplished, the attainment of a second language is quite feasible...
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