chapter 1 introduction 1.1 research orientation 1.2 the status of age effects in second language acquisition 1.3 second language environment and foreign language itructionenvironment 1.4 rationale for the study 1.5 key research questio 1.6 organization of the bookchapter 2 previous studies on age effects in second languageacquisition 2.1 introduction 2.2 general views of the age effects in second languageacquisition 2.3 critical period hypothesis in language acquisition 2.3.1 the concept of critical period 2.3.2 critical period hypothesis in language acquisition 2.4 behavioral studies of cph in second language acquisition 2.4.1 introduction 2.4.2 proponent of cph in second language achievements 2.4.3 opponent of cph in second language achievements 2.5 neurological studies of cph |
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