About the Book Chapter One An Introduction to Second Language Acquisition 1.1 Definition of Second Language Acquisition(SLA) 1.2 the Aims of SLA Research 1.3 Basic Terminologies in SLA 1.3.1 Native language and target language 1.3.2 Second language and foreign language 1.3.3 Library language, auxiliary language and language for specific purposes 1.3.4 Bilingualism and multilingualism 1.3.5 Acquisition and learning 1.3.6 Second language acquisition and foreign language learning 1.3.7 Input and output 1.3.8 Competence and performance 1.3.9 Comprehension and production 1.3.10 Explicit learning and implicit learning 1.3.11 Naturalistic and instructed second language acquisition 1.4 The External and Internal Factors in SLA 1.4.1 External factors 1.4.2 Internal factors 1.5 A Review of First Language Acquisition 1.5.1 From babbling to words 1.5.2 Development of inflections and function words 1.5.3 Development of negatives and interrogatives Chapter Two The Study of Interlanguage 2.1 Background to the Study of Interlanguage 2.2 The Interlanguage Hypothesis 2.1.1 definition of interlanguage 2.2.2 development of the interlanguage hypothesis 2.2.3 The revised interlanguage hypothesis 2.3 Characteristics of Interlanguage 2.4 Major Findings in Interlanguage Studies 2.4.1 Systematic change in grammar 2.4.2 Acquisition order and sequence of acquisition 2.4.3 L1 influence 2.5 Interlanguage Pragmatics 2.5.1 Second language speech act 2.5.2 Production of speech acts: differences between L2 learners and L1 speakers 2.5.3 Sociopragmatic competence and pragmalinguistic competence 2.5.4 Comments on L2 speech act research Chapter Three Linguistic Aspects of SLA Chapter Four Psychological Aspects of SLA Chapter Five Socio-cultural Aspects of SLA Chapter Six Instruction and Second Language Acquisition Chapter Seven Second Language Acquisition Research: Data Collection and Analysis Appendix 1 A Glossary of English Terms in This Book Appendix 2 Reference Key to Some Questions in the Assignment References