Second Language Learning Theories Written by a team of leading experts working in different SLA specialisms, this fourth edition is a clear and concise introduction to the main theories of second language acquisition (SLA) from multiple perspectives, comprehensively updated to reflect the very latest developments in SLA research in recent years. The book covers all the main theoretical perspectives currently active in SLA and sets each chapter within a broader framework. Each chapter examines the claims and scope of each theory and how each views language, the learner and the acquisition process, supplemented by summaries of key studies and data examples from a variety of languages. Chapters end with an evaluative summary of the theories discussed. Key features to this fourth edition include updated accounts of developments in cognitive approaches to second language (L2) learning, the implications of advances in generative linguistics and the “social turn” in L2 research, with re-worked chapters on functional, sociocultural and sociolinguistic perspectives, and an entirely new chapter on theory integration, in addition to updated examples using new studies. Second Language Learning Theories continues to be an essential resource for graduate students in second language acquisition. Rosamond Mitchell is Emeritus Professor of Applied Linguistics at the University of Southampton, UK. Florence Myles is Professor of Second Language Acquisition at the University of Essex, UK. Emma Marsden is Professor at the Centre for Research into Language Learning and Use at the University of York, UK. “This book continues to be a comprehensive and up-to-date introduction to the ever-growing field of Second Language Learning research. With its systematic structure and its numerous illustrations from empirical work, the book will allow students and language teachers alike to compare and to contrast the aims, the claims and the scopes of the leading L2 theories in the field today. If you want to know something about the scientific study of Second Language Learning, there is no better place to start than right here.” Jonas Granfeldt, Lund University, Sweden “This new edition is excellent news.The combined interests and ­expertise of its authors ensure a very complete and balanced overview that will f­ascinate students and strengthen their interest in the field.” Carmen Muñoz, University of Barcelona, Spain “Having used the previous three editions in my SLA courses, I ­enthusiastically welcome the fourth edition of Second Language Learning Theories. ­Presenting new data from a range of languages, it clearly illustrates the major theoretical approaches of the discipline.” Julia Herschensohn, University of Washington, USA Second Language Learning Theories Fourth Edition Rosamond Mitchell, Florence Myles and Emma Marsden Fourth edition published 2019 by Routledge 52 Vanderbilt Avenue, New York, NY 10017 and by Routledge 2 Park Square, Milton Park, Abingdon, Oxon, OX14 4RN Routledge is an imprint of the Taylor & Francis Group, an informa business © 2019 Taylor & Francis The right of Rosamond Mitchell, Florence Myles and Emma Marsden to be identified as authors of this work has been asserted by them in accordance with sections 77 and 78 of the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this book may be reprinted or reproduced or utilised in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publishers. Trademark notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation without intent to infringe. First edition published by Hodder Arnold 1998 Third edition published by Routledge 2013 Library of Congress Cataloging-in-Publication Data A catalog record for this book has been requested ISBN: 978-1-138-67140-9 (hbk) ISBN: 978-1-138-67141-6 (pbk) ISBN: 978-1-315-61704-6 (ebk) Typeset in Bembo by Apex CoVantage, LLC Contents List of Illustrationsviii Acknowledgementsx Prefacexiii 1 Second Language Learning: Key Concepts and Issues 1.1 Introduction 1 1.2 What Makes for a Good Theory? 2 1.3 Views on the Nature of Language 6 1.4 The Language Learning Process 11 1.5 Views of the Language Learner 21 1.6 Links with Social Practice 27 1.7 Conclusion 28 References 28 2 The Recent History of Second Language Learning Research 2.1 Introduction 39 2.2 The 1950s and 1960s 40 2.3 The 1970s 43 2.4 The 1980s: A Turning Point 57 2.5 Continuities and New Themes in the Research Agenda 60 2.6 Second Language Learning Timeline 63 References 77 3 Linguistics and Language Learning: The Universal Grammar Approach 3.1 Introduction 81 3.2 Why a Universal Grammar? 82 3.3 What Does UG Consist Of? 89 3.4 UG and L1 Acquisition 98 3.5 UG and L2 Acquisition 102 3.6 Evaluation of UG-Based Approaches to L2 Acquisition 116 References 119 1 39 81 vi Contents 4 Cognitive Approaches to Second Language Learning (1): General Learning Mechanisms 4.1 Introduction 128 4.2 Input-Based Emergentist Perspectives 129 4.3 Processing-Based Perspectives 146 4.4 Evaluation of General Cognitive Approaches 154 References 158 5 Cognitive Approaches to Second Language Learning (2): Memory Systems, Explicit Knowledge and Skill Learning 5.1 Introduction 167 5.2 Memory Systems and Their Role in L2 Learning 169 5.3 Explicit Knowledge, Information Processing and Skill Acquisition 175 5.4 Awareness and Attention in L2 Acquisition 186 5.5 Working Memory and L2 Learning 189 5.6 Evaluation of Cognitive Approaches (2): Memory Systems, Explicit Knowledge and Skill Learning 195 References 198 6 Interaction in Second Language Learning 6.1 Introduction 209 6.2 The Revised Interaction Hypothesis (Long, 1996): An Appeal to Cognitive Theory 211 6.3 Negotiation of Meaning and the Learning of Target L2 Structures and Vocabulary 213 6.4 The Role of Feedback during Oral Interaction 216 6.5 The Problem of “Noticing” 226 6.6 L2 Development in Computer-Mediated Interaction 229 6.7 Characteristics of Learners and of Tasks 231 6.8 Evaluation 232 References 236 7 Meaning-Based Perspectives on Second Language Learning 7.1 Introduction 242 7.2 Early Functionalist Studies of SLL 243 7.3 Functionalism beyond the Case Study:The “Learner Varieties” Approach 249 7.4 “Time Talk”: Developing the Means to Talk about Time 255 7.5 The Aspect Hypothesis 259 7.6 Cognitive Linguistics and “Thinking for Speaking” 263 128 167 209 242 Contents vii 7.7 Second Language Pragmatics 269 7.8 Evaluation 276 References 279 8 Sociocultural Perspectives on Second Language Learning 8.1 Introduction 286 8.2 Sociocultural Theory 286 8.3 Applications of SCT to Second Language Learning 293 8.4 Evaluation 317 References 320 286 9 Sociolinguistic Perspectives 326 9.1 Introduction 326 9.2 Sociolinguistically Driven Variability in Second Language Use 326 9.3 Second Language Socialization 333 9.4 Conversation Analysis and Second Language Learning 342 9.5 Communities of Practice and Situated Learning 348 9.6 The Language Learner as Social Being: L2 Identity, Agency and Investment 355 9.7 Evaluation:The Scope and Achievements of Sociolinguistic Enquiry 363 References 365 10 Integrating Theoretical Perspectives on Second Language Learning 10.1 Introduction 373 10.2 The MOGUL Framework 376 10.3 Dynamic Systems Theory (DST) 384 10.4 Conclusion 394 References 395 11 Conclusion 11.1 One Theory or Many? 399 11.2 Main Achievements of Second Language Learning Research 399 11.3 Future Directions for Second Language Learning Research 402 11.4 How to Do Research 403 11.5 Second Language Learning Research and Language Education 405 References 407 373 399 Glossary410 Subject Index424 Name Index433 Illustrations Tables 4.1 4.2 4.3 6.1 6.2 6.3 6.4 7.1 7.2 7.3 7.4 7.5 7.6 8.1 8.2 8.3 8.4 9.1 9.2 9.3 Input Profile of Difficult and Easy Constructions 131 Processability Hierarchy for English Questions 149 Predicted and Actual Degree of Difficulty Based on Isomorphism154 Examples of Interactional Modifications in NS-NNS Conversations212 Immersion Teachers’ Feedback Moves 218 Negative Feedback and Modified Output, Number of 224 Tokens per Group Question Development, Number of Learners per Group 225 Pragmatic and Syntactic Modes of Expression 244 Paratactic Precursors of Different Target Language Constructions248 Coding Scheme and Example Utterances from The Finite Story254 Distribution of Commonest Forms for Future Expression 258 in L1/L2 Spanish Number of Participants Producing Each Future Form 258 Summary of the Main Verbs Used for Danish and Spanish 268 Placement Events Perceptions of PBLL Activity: Sample Participants’ Comments299 Regulatory Scale for Error Feedback: Implicit (Strategic) to Explicit303 Microgenesis in the Language System 304 Methods of Assistance Occurring during Classroom Peer Interaction307 [t]/[d] Deletion in Detroit African-American Speech 329 Varbrul Results for [t]/[d] Deletion by African-American Speakers from Detroit: Hypothetical Data Inferred from Table 9.1329 [t]/[d] Absence by Grammatical Category in ChineseEnglish Interlanguage and in Native English Dialects 330 Illustrations ix Figures 1.1 Spolsky’s General Model of Second Language Learning 4 2.1 Acquisition Hierarchy for 13 English Grammatical Morphemes for Spanish-Speaking and CantoneseSpeaking Children 50 2.2 Comparison of Adult and Child Acquisition Sequences for 51 Eight Grammatical Morphemes 5.1 Comparing Declarative and Procedural Memory Systems 172 of L1 and L2 Learners 6.1 Mean Accuracy of Three Groups on Test of Possessive 220 Determiners (Oral Picture Description Task) 6.2 Performance of (a) “Low” and (b) “High” Students on Grammaticality Judgement Task (Written Error 221 Correction Task) 7.1 Expected Direction of Spread of Preterit and Imperfect Forms in L2 Spanish across Lexical Classes 260 7.2 Diagrammatic Representation of Modal Verbs Will and May264 7.3 Distribution of Request Types by Learner Group 273 8.1 Model of an Activity System 293 8.2 Activity of L1 Arabic and L1 Korean Students Using 301 Web Tutor 8.3 Development of Self-Regulation over Time 306 8.4 Didactic Model for Mood Selection in Spanish 312 8.5 Sample Pedagogical Diagram: “Social Distance” 313 9.1 A Sample Individual Network of Practice (INoP): Liliana 352 10.1 The Multifaceted Nature of Language Learning and Teaching374 10.2 The General MOGUL Framework 377 10.3 The Wider Language System of MOGUL 377 10.4 Core Language Architecture within MOGUL 378 10.5 The Word Lamp as a Representational Chain 380 10.6 Moving Min-Max Graph Showing the Development of 389 Case Accuracy over Time 10.7 Development of Complexity on (a) the Morphological 390 Level, (b) the Noun Phrase Level and (c) the Sentence Level Acknowledgements The authors and publishers wish to thank the following for permission to use copyright material: Academic Press/Emerald Publishing: figure from “From discourse to syntax: Grammar as a processing strategy”, by T. Givón, in Syntax and Semantics 12, 1979. Cambridge University Press: table from “Corrective feedback and learner uptake”, by R. Lyster and L. Ranta, Studies in Second Language Acquisition 19, 1996. Two tables from “Identifying the impact of negative feedback and learners’ responses on ESL question development”, by K. McDonough, Studies in Second Language Acquisition 27, 2005. Two figures from “One size fits all? Recasts, prompts and L2 learning”, by A. Ammar and N. Spada, Studies in Second Language Acquisition 28, 2006. Figure from “The role of dynamic contrasts in the L2 acquisition of Spanish past tense morphology”, by L. Dominguez, N. Tracy-Ventura, M.J. Arche, Rosamond Mitchell and Florence Myles, Bilingualism: Language and Cognition 16, 2013.Three figures from Michael Sharwood Smith and John Truscott, The multilingual mind: A modular processing perspective, © Michael Sharwood Smith and John Truscott 2014. Figure from Michael Sharwood Smith, Introducing language and cognition: A map of the mind, © Michael Sharwood Smith 2017. Elsevier: figure from “Sociocultural influences on the use of a web-based tool for learning English vocabulary”, by A. Juffs and B.E. Friedline, System 42, 2014. Equinox Publishing Ltd: figure from “Revolutionary pedagogies: Learning that leads (to) second language development”, by E. Negueruela, in Sociocultural theory and the teaching of second languages, edited by J.P. Lantolf and M. Poehner, © Equinox Publishing Ltd 2008. Figure from “Understanding the revolutionary character of L2 development in the ZPD: Why levels of mediation matter”, by J.P. Lantolf, L. Kurtz and O. Kisselev, Language and Sociocultural Theory 3, © Equinox Publishing Ltd 2016. John Benjamins Publishing Company: Table from “Competing constraints on variation in the speech of adult Chinese learners of English”, by R.J. Bayley, in Second language acquisition and linguistic variation, edited by R. Bayley and D.R. Preston, 1996.Two tables from “Variationist perspectives Acknowledgements xi on second language acquisition”, by D.R. Preston, in Second language acquisition and linguistic variation, edited by R. Bayley and D.R. Preston, 1996. Table from The development of the grammatical system in early second language acquisition: The multiple constraints hypothesis, by A. Lenzing, 2013. With kind permission by John Benjamins Publishing Company, Amsterdam/Philadelphia. www.benjamins.com. John Wiley & Sons Inc.: figure from “Negative feedback as regulation and second language learning in the Zone of Proximal Development”, by A. Aljaafreh and J.P. Lantolf, The Modern Language Journal 78, 1994. Table from “Some input on the easy/difficult grammar question: An empirical study”, by L. Collins et al., The Modern Language Journal 93, 2009. Figure from “A transdisciplinary framework for SLA in a multilingual world”, by Douglas Fir Group, The Modern Language Journal 100 (S1), 2016. Figure from “Instructed concept appropriation and L2 pragmatic development in the classroom”, by R.A. van Compernolle and A. Henery, Language Learning 64, 2014. Table from “Semantic categorization of placement verbs in L1 and L2 Danish and Spanish”, by T. Cadierno, I. Ibarretxe-Antuñano and A. HijazoGascón, Language Learning 66, 2016.Two tables from “What we gain by combining variationist and concept-oriented approaches: The case of acquiring Spanish future-time expression”, by M. Kanwit, Language Learning 67, 2017. Table from “Beyond statistical learning: Communication principles and ­language-internal factors shape grammar in child and adult beginners learning Polish through controlled exposure”, by C. Dimroth, Language Learning Early View, 2018.Table from “The impact of interaction on comprehension”, by T. Pica, R. Young and C. Doughty, TESOL Quarterly 21, 1987. Figure from “Academic English socialization through individual networks of practice”, by S. Zappa-Hollman and P.A. Duff, TESOL Quarterly 49, 2015. MIT Press: Extract from Impossible languages, by A. Moro, 2016. National Academy of Sciences: Figure from “Child first language and adult second language are both tied to general-purpose learning systems”, by P. Hamrick, J.A.G. Lum and M.T. Ullman, Proceedings of the National Academy of Sciences 115, 2018. Oxford University Press: two figures from Language two, by H. Dulay, M. Burt and S. Krashen, reproduced by permission of Oxford University Press. Copyright © 1982 Oxford University Press, Inc. Figure from Conditions for second language learning, by B. Spolsky, reproduced by permission of Oxford University Press. Copyright © B. Spolsky 1989. Table from “A note on canonical word order”, by W. O’Grady and Y. Yamashita, Applied Linguistics 26, 2005. Two figures from “Dynamic patterns in development of accuracy and complexity: A longitudinal case study in the acquisition of Finnish”, by M. Spoelman and M. Verspoor, Applied Linguistics 31, 2010. Figure from “Enriching activity theory without shortcuts”, by Yrjö Engeström, Interacting with Computers 20, 2008. Taylor & Francis: Table from Second language acquisition processes in the classroom: Learning Japanese, by A.S. Ohta, 2001. Figure from Cognitive linguistics xii Acknowledgements and second language learning: Theoretical basics and experimental evidence, by K. Tyler, 2012. Table from “Project-based language learning: An activity theory analysis”, by M. Gibbes and L. Carson, Innovation in Language Learning and Teaching 8, 2014. Walter de Gruyter and Company: Figure from “Pragmatic development in the Spanish as a FL classroom”, by J.C. Félix-Brasdefer, Intercultural Pragmatics 4, 2007. Preface 0.1 Aims of This Book This book is the result of collaboration between researchers interested in second language (L2) learning from a range of perspectives: linguistic (Myles), cognitive (Marsden) and social/educational (Mitchell). As in previous editions, our general aim is to provide an up-to-date, introductory overview of the current state of L2 studies. Our intended audience is wide: undergraduates following first degrees in language/linguistics, graduate students embarking on courses in foreign language education/English as a foreign language/applied linguistics, and a broader audience of teachers and other professionals concerned with L2 education and development. Second language learning is a field of research with potential to make its own distinctive contribution to fundamental understandings of, for example, the workings of the human mind or the nature of language. It also has the potential to inform the improvement of social practice in a range of fields, most obviously in language education. We ourselves are interested in L2 learning from both perspectives, and are concerned to make it intelligible to the widest possible audience. All commentators recognize that while the field of L2 research has been extremely active and productive in recent decades, we have not yet arrived at a unified or comprehensive view of how second languages are learned, although tentative models have regularly been proposed (see Chapter 10).We have therefore organized this book as a presentation and critical review of a number of different L2 theories, which can broadly be viewed as linguistic, psycholinguistic and sociolinguistic. Indeed, the overall “map” of the field we proposed in the first edition largely survives today, reflecting the fact that key strands of research already active 20 years ago have continued to flourish and develop. No single theoretical position has achieved dominance, and new theoretical orientations continue to appear. Whether this is a desirable state of affairs or not has been an issue of some controversy (see discussion in Chapter 1). On the whole, while we fully accept the arguments for the need for cumulative programmes of research within the framework of a particular theory, we incline towards a pluralist view of L2 theorizing. In any case, it is xiv Preface obvious that students entering the field today need a broad introduction to a range of theoretical positions, with the tools to evaluate their goals, strengths and limitations, and this is what we aim to offer. In this fourth edition, our primary aim remains the same: to introduce the reader to those theoretical orientations on language learning which seem currently most productive and interesting for our intended audience. But we have revised our text throughout to reflect the substantial developments that have taken place in the field in the last few years, so that the work aims to be fully up to date. In particular, the new edition takes account of substantial recent developments in cognitive approaches to L2 learning, and we also review the implications of recent advances in generative linguistics (Chomsky’s Minimalist Program); the strength of the ongoing “social turn” in L2 research has been acknowledged, with substantial revisions of later chapters dealing with functional, sociocultural and sociolinguistic perspectives; and in an entirely new chapter, we evaluate some contrasting recent proposals for a more integrative approach to L2 theorizing. Throughout the book, key theoretical and methodological advances are presented and explained, greater attention has been paid to research on internet-based language learning, and new studies (in a range of languages, and with recent methodological innovations) have been incorporated as examples. The evaluation sections in each chapter have been expanded, and the book is rebalanced in favour of newer material. As one clear sign of the vigour and dynamism of L2 research, a very high number of surveys, reviews and meta-analyses are available. Reflecting the variety of the field, these vary in their focus and aims. Some are written from the perspective of a single theoretical position, construct or issue (e.g. Cook & Newson, 2007; Deters, Gao, Miller, & Vitanova, 2015; Duff & May, 2017; Gass, Spinner, & Behney, 2018; Hawkins, 2001; Hulstijn, 2015; Lantolf & Poehner, 2014; Lardiere, 2007; Leung, 2009; Li, 2015; Mackey, 2007; MacWhinney & O’Grady, 2015; Ortega & Han, 2017; Loewen & Sato, 2017; Paradis, 2009; Rebuschat, 2015; Slabakova, 2016; Taguchi & Roever, 2017; Thomas, 2004; Wen, Borges Mota, & McNeill, 2015); some are encyclopaedic in scope and ambition (e.g. Atkinson, 2011; R. Ellis, 2015; Gass & Mackey, 2012; Gass, Behney, & Plonsky, 2013; Herschensohn & Young-Scholten, 2013; Ortega, 2009; Ritchie & Bhatia, 2009; Robinson, 2013); some pay detailed attention to research design and methods and data analysis (e.g. Barkhuizen, Benson, & Chik, 2014; Duff, 2008; Kasper & Wagner, 2014; Li Wei & Moyer, 2008; Mackey & Gass, 2015; Mackey & Marsden, 2016; Marsden, Morgan-Short, Thompson, & Abugaber, 2018; Norris, Ross, & Schoonen, 2015; Phakiti, De Costa, Plonsky, & Starfield, 2018; Plonsky, 2015). This particular book is intended as a unified introduction to the field, for students without a substantial prior background in linguistics. We begin with an introduction to key concepts (Chapter 1) and a historical account of how the second language learning field has developed (Chapter 2). In later chapters (3–9) we have made a selection from across the range of L2 studies Preface xv of a range of theoretical positions which we believe are most active and significant. To represent linguistic theorizing, we have concentrated on the Universal Grammar approach (Chapter 3). In Chapters 4 and 5 we deal with a selection of cognitive theories: in Chapter 4 we examine the application to L2 learning of general and implicit learning mechanisms, concentrating on emergentist and processing perspectives, while in Chapter 5 we explore the place of memory, explicit knowledge and attention, and their contribution to L2 skill acquisition in particular. Chapter 6 explores the concept of L2 interaction, tracing earlier and later versions of the Interaction Hypothesis and related theories. Chapter 7 examines a range of theoretical positions which assume the centrality of meaning-making for second language learning (functionalism, “cognitive linguistics”, L2 pragmatics). Chapter 8 deals with sociocultural theory and some of its more recent extensions (activity theory, dynamic assessment, concept-based instruction). In Chapter 9 we turn to the emergence of socially patterned variation in L2, and examine L2 socialization theory, as well as theories of L2 identity, agency and investment as applied. Each of these theoretical positions is explained, and then illustrated by discussion of a small number of key empirical studies which have been inspired by that approach. We use these studies to illustrate the methodologies which are characteristic of the different research traditions (from controlled laboratory-based studies of people learning artificial languages to naturalistic observation of informal learning in the community); the scope and nature of the language “facts” which are felt to be important within that family of theories; and the kinds of generalizations which are drawn. Where appropriate, we refer our readers to parallels in first language acquisition research, and also to more comprehensive treatments of the research evidence relevant to different theoretical positions. Each chapter concludes with an evaluation section (see below). We have introduced an entirely new chapter (10) which discusses prospects for more integrative approaches to L2 theorizing. We review contemporary calls for building shared, transdisciplinary frameworks within which to locate the various research traditions, and we present two current integrative initiatives: the Modular Online Growth and Use of Language (MOGUL) project, and Complexity Theory/Dynamic Systems Theory (DST). In addition to these revisions, we have updated our timeline of important milestones in the development of L2 research, as well as our glossary explaining key terms used in the book. 0.2 Comparing Second Language Learning Perspectives We want to encourage our readers to compare and contrast the various theoretical perspectives we discuss in the book, so that they can get a better sense of the kinds of issues which different theories are trying to explain, and the extent to which they are supported to date with empirical evidence. xvi Preface In reviewing our chosen perspectives, therefore, we evaluate each systematically, considering the nature and extent of empirical support and paying attention to the following factors: The claims and scope of the theory; The view of language involved in the theory; The view of the language learning process; The view of the learner. In Chapter 1 we discuss each of these factors briefly, introducing key terminology and critical issues which have proved important in distinguishing one theory from another. References Atkinson, D. (2011). Alternative approaches to second language acquisition. Abingdon/New York: Routledge. Barkhuizen, G., Benson, P., & Chik, A. (2014). Narrative inquiry in language teaching and learning research. Abingdon/New York: Routledge. Cook, V., & Newson, M. (2007). Chomsky’s Universal Grammar: An introduction (3rd ed.). Oxford: Wiley Blackwell. Deters, P., Gao, X., Miller, E. R., & Vitanova, G. (Eds.). (2015). Theorizing and analyzing agency in second language learning. Bristol: Multilingual Matters. Duff, P. A. (2008). Case study research in applied linguistics. Abingdon/New York: Routledge. Duff, P. A., & May, S. (Eds.). (2017). Encyclopedia of language and education, 3rd edition: Language socialization. Cham: Springer International Publishing. Ellis, R. (2015). Understanding second language acquisition (2nd ed.). Oxford: Oxford University Press. Gass, S. M., Behney, J., & Plonsky, L. (2013). Second language acquisition: An introductory course (4th ed.). Abingdon/New York: Routledge. Gass, S. M., & Mackey, A. (Eds.). (2012). The Routledge handbook of second language acquisition. Abingdon/New York: Routledge. Gass, S. M., Spinner, P., & Behney, J. (Eds.). (2018). Salience in second language acquisition. Abingdon/New York: Routledge. Hawkins, R. (2001). Second language syntax: A generative introduction. Oxford: Wiley Blackwell. Herschensohn, J., & Young-Scholten, M. (Eds.). (2013). The Cambridge handbook of second language acquisition. Cambridge: Cambridge University Press. Hulstijn, J. H. (2015). Language proficiency in native and non-native speakers: Theory and research. Amsterdam: John Benjamins. Kasper, G., & Wagner, J. (2014). Conversation analysis in applied linguistics. Annual Review of Applied Linguistics, 34, 1–42. Lantolf, J. P., & Poehner, M. E. (2014). Sociocultural theory and the pedagogical imperative in L2 education:Vygotskian praxis and the research/practice divide. Abingdon: Routledge. Lardiere, D. (2007). Ultimate attainment in second language acquisition: A case study. Mahwah, NJ: Lawrence Erlbaum. Preface xvii Leung,Y. I. (Ed.). (2009). Third language acquisition and Universal Grammar. Clevedon: Multilingual Matters. Li, S. (2015). The associations between language aptitude and second language grammar acquisition: A meta-analytic review of five decades of research. Applied Linguistics, 36, 385–408. Li Wei, & Moyer, M. G. (2008). The Blackwell guide to research methods in bilingualism and multilingualism. Malden, MA: Wiley Blackwell. Loewen, S., & Sato, M. (Eds.). (2017). The Routledge handbook of instructed second language acquisition. Abingdon/New York: Routledge. Mackey, A. (Ed.). (2007). Conversational interaction in second language acquisition. Oxford: Oxford University Press. Mackey, A., & Gass, S. M. (2015). Second language research: Methodology and design. Abingdon/New York: Routledge. Mackey, A., & Marsden, E. (Eds.). (2016). Advancing methodology and practice: The IRIS repository of instruments for research into second languages. Abingdon/New York: Routledge. Marsden, E., Morgan-Short, K., Thompson, S., & Abugaber, D. (2018). Replication in second language research: Narrative and systematic reviews, and recommendations for the field. Language Learning, 68, 321–391. MacWhinney, B., & O’Grady, W. (Eds.). (2015). The handbook of language emergence. Chichester/West Sussex/Malden, MA: Wiley Blackwell. Norris, J. M., Ross, S., & Schoonen, R. (Eds.). (2015). Improving and extending quantitative reasoning in second language research [Special issue]. Language Learning, 65. Ortega, L. (2009). Understanding second language acquisition. London: Hodder Education. Ortega, L., & Han, Z.-H. (Eds.). (2017). Complexity theory and language development: In celebration of Diane Larsen-Freeman. Amsterdam: John Benjamins. Paradis, M. (2009). Declarative and procedural determinants of second languages. Amsterdam: John Benjamins. Phakiti, A., De Costa, P., Plonsky, L., & Starfield, S. (Eds.). (2018). The Palgrave handbook of applied linguistics research methodology. New York: Palgrave. Plonsky, L. (Ed.). (2015). Advancing quantitative methods in second language research. New York: Routledge. Rebuschat, P. (Ed.). (2015). Implicit and explicit learning of languages. Amsterdam: John Benjamins. Ritchie,W.C., & Bhatia,T. K. (Eds.). (2009). The new handbook of second language acquisition. Bingley: Emerald Group. Robinson, P. (Ed.). (2013). The Routledge encyclopedia of second language acquisition. Abingdon/New York: Routledge. Slabakova, R. (2016). Second language acquisition. Oxford: Oxford University Press. Taguchi, N., & Roever, C. (2017). Second language pragmatics. Oxford: Oxford University Press. Thomas, M. (2004). Universal grammar in second language acquisition: A history. London: Routledge. Wen, Z., Borges Mota, M., & McNeill, A. (Eds.). (2015). Working memory in second language acquisition and processing. Bristol: Multilingual Matters. 1 Second Language Learning Key Concepts and Issues 1.1 Introduction This preparatory chapter provides an overview of key concepts and issues which will recur throughout the book. We offer introductory definitions of a range of terms, and try to equip the reader with the means to compare the goals and claims of particular theories with one another. We also summarize key issues, and indicate where they will be explored in more detail later in the book. The main themes to be dealt with in following sections are: 1.2 1.3 1.4 1.5 1.6 What makes for a “good” explanation or theory Views on the nature of language Views of the language learning process Views of the language learner Links between language learning theory and social practice. First, however, we must offer a preliminary definition of our most central concept, “second language learning” (SLL). We define this broadly, to include the learning of any language, to any level, provided only that the learning of the “second” language takes place sometime later than the learning by infants and very young children of their first language(s) (i.e. from around the age of 4). Simultaneous infant bilingualism from birth is of course a common phenomenon, but this is a specialist topic, with its own literature, which we do not try to address in this book; for overviews see, for example, Serratrice (2013) and Nicoladis (2018). We do, however, take account of the thriving research interest in interactions and mutual influences between “first” languages (L1s) and later-acquired languages, surveyed, for example, in Cook and Li Wei (2016) and Pavlenko (2011); aspects of this work are discussed in later chapters. For us, therefore, “second languages” are any languages learned later than in earliest childhood. They may indeed be the second language (the L2) the learner is working with, in a literal sense, or they may be his/her third, fourth 2 Second Language Learning or fifth language. They encompass both languages of wider communication encountered within the local region or community (e.g. in educational institutions, at the workplace or in the media) and truly foreign languages, which have no substantial local uses or numbers of speakers. We include “foreign” languages under our more general term of “second” languages because we believe that many (if not all) of the underlying learning processes are broadly similar for more local and more remote target languages, despite differing learning purposes, circumstances and, often, the quantity and nature of experiences with the language. (And, of course, languages are increasingly accessible via the internet, a means of communication which cuts across any simple “local”/“foreign” distinction.) We are also interested in all kinds of learning, whether formal, planned and systematic (as in classroom-based learning) or informal and incidental to communication (as when a new language is “picked up” in the community or via the internet). Following the proposals of Stephen Krashen (1981), some L2 researchers have made a principled terminological distinction between formal, conscious learning and informal, unconscious acquisition. Krashen’s “Acquisition-Learning” hypothesis is discussed further in Chapter 2; however, many researchers in the field do not distinguish between the two terms, and unless specially indicated, we ourselves will be using both terms interchangeably. (Note, in Chapters 4 and 5, where the distinction between conscious and unconscious learning is central, we will use the terms “implicit” and “explicit” learning, which often broadly align with the distinction between “acquisition” and “learning”.) 1.2 What Makes for a Good Theory? Second language (L2) learning is an immensely complex phenomenon. Millions of human beings experience L2 learning and may have a good practical understanding of activities that helped them to learn. But this experience and common-sense understanding are clearly not enough to help us explain the learning process fully. We know, for a start, that people cannot reliably describe the language system that they have internalized, nor the mechanisms that process, store and retrieve many aspects of that new language. We need to understand L2 learning better than we do, for two basic reasons: 1. Because improved knowledge in this domain is interesting in itself and can contribute to a more general understanding about the nature of language, human learning and intercultural communication, and thus about the human mind itself, as well as how all these affect each other; 2. Because the knowledge will be useful. If we become better able to account for both success and failure in L2 learning, there will be a payoff for many teachers and their learners. We can only pursue a better understanding of L2 learning in an organized and productive way if our efforts are guided by some form of theory Second Language Learning 3 (Hulstijn, 2014; Jordan, 2013;VanPatten & J.Williams, 2015). For our purposes, a theory is a (more or less) abstract set of claims about significant entities within the phenomenon under study, the relationships between them, and the processes that bring about change.Thus, a theory aims not just at description, but at explanation. Theories may be embryonic and restricted in scope, or more elaborate, explicit and comprehensive. They may deal with different areas of interest; thus, a property theory will be primarily concerned with modelling the nature of the language system to be acquired, while a transition theory will be primarily concerned with modelling the developmental processes of acquisition (Gregg, 2003; Jordan, 2004, Chapter 5; Sharwood Smith, Truscott, & Hawkins, 2013). One particular property theory may deal only with one domain of language (such as morphosyntax, phonology or the lexicon). Likewise, one particular transition theory itself may deal only with a particular stage of L2 learning or with the learning of some particular subcomponent of language; or it may propose learning mechanisms that are much more general in scope. Worthwhile theories are collaboratively produced and evolve through a process of systematic enquiry in which the claims of the theory are assessed against some kind of evidence or data. This may take place through hypothesis-testing through formal experiment, or through more ecological procedures, where naturally occurring data are analysed. In addition, bottom-up theory development can happen, usually through reflections on data (whether naturally or experimentally elicited), from which theories can emerge and become articulated. (There is now a considerable number of manuals offering guidance on research methods in both traditions, such as Mackey & Gass, 2012; Phakiti, De Costa, Plonsky, & Starfield, 2018. We will provide basic introductions to a range of research procedures as needed, throughout the book and also in the Glossary.) Finally, the process of theory building is a reflexive one; new developments in the theory lead to the need to collect new information and explore different phenomena and different patterns in the potentially infinite world of “facts” and data. Puzzling “facts” and patterns that fail to fit with expectations in turn lead to new, more powerful theoretical insights. To make these ideas more concrete, an early “model” of L2 learning is shown in Figure 1.1, taken from Spolsky (1989). This model represents a “general theory of second language learning”, as the proposer described it (p. 14). The model encapsulates this researcher’s theoretical views on the overall relationship between contextual factors, individual learner differences, learning opportunities and learning outcomes. It is thus an ambitious model, in the breadth of phenomena it is trying to explain. The rectangular boxes show the factors (or variables) which the researcher believes are most significant for learning, that is, where variation can lead to differences in success or failure.The arrows connecting the various boxes show directions of influence.The contents of the various boxes are defined at great length, as consisting of clusters of interacting “Conditions” (74 in all: 1989, pp. 16–25), which make language learning success more or less likely. These summarize the results of a great variety of empirical language learning research, as Spolsky interprets them. provides Social context leads to Attitudes (of various kinds) which appear in the learner as Motivation which joins with other personal characteristics such as Age Personality Capabilities Previous Knowledge all of which explain the use the learner makes of the available Learning opportunities (formal or informal) the interplay between learner and situation determining Linguistic and non-linguistic outcomes for the learner Figure 1.1 Spolsky’s General Model of Second Language Learning Source: Spolsky, 1989, p. 28 Second Language Learning 5 How would we begin to evaluate this or any other model, or, even more modestly, to decide that this was a view of the language learning process we could work with? This would depend partly on the extent to which the author has taken account of evidence and provided a systematic account of it. It would also depend on rather broader philosophical positions: for example, are we satisfied with an account of human learning which sees individual differences as both relatively fixed and also highly influential for learning? Finally, it would also depend on the particular focus of our own interests, within L2 learning; this particular model seems well adapted for the study of the individual learner, for example, but has relatively little to say about the social relationships in which they engage, the way they process new language, nor the kinds of language system they construct. Since at least the mid 1990s, there has been debate about the adequacy of the theoretical frameworks used to underpin research on L2 learning. One main line of criticism has been that L2 research (as exemplified by Spolsky, 1989) has historically been too preoccupied with the cognition of the individual learner, and sociocultural dimensions of learning have been neglected. From this perspective language is an essentially social phenomenon, and L2 learning itself is a “social accomplishment”, which is “situated in social interaction” (Firth & Wagner, 2007, p. 807) and discoverable through scrutiny of L2 use, using techniques such as conversation analysis (Pekarek Doehler, 2010; Kasper & Wagner, 2011). A second—though not unrelated—debate has concerned the extent to which L2 theorizing has become too broad. Long (1993) and others argued that “normal science” advanced through competition between a limited number of theories, and that the L2 field was weakened by theory proliferation. This received a vigorous riposte from Lantolf (1996) among others, advancing the postmodern view that knowledge claims are a matter of discourses. From this point of view, all scientific theories are viewed as “metaphors that have achieved the status of acceptance by a group of people we refer to as scientists” (p. 721), and scientific theory building is all about “taking metaphors seriously” (p. 723). For Lantolf, any reduction in the number of “official metaphors” debated could “suffocate” those espousing different world views. These debates about the nature of knowledge, theory and explanation have persisted up to the present. It is probably fair to say that the majority of L2 researchers today adopt some version of a “rationalist” or “realist” position ( Jordan, 2004; Long, 2007; Sealey & Carter, 2004, 2014). This position is grounded in the philosophical view that an objective and knowable world exists (i.e. not only discourses), and that it is possible to build and test successively more powerful explanations of how that world works, through systematic programmes of enquiry and of problem-solving. Indeed, this is the position we take in this book. However, like numerous others ( Jordan, 2004; Ortega, 2011; Rothman & VanPatten, 2013; Zuengler & Miller, 2006), we acknowledge that a proliferation of theories is necessary to make better sense of the varied phenomena of SLL, the agency of language learners, and 6 Second Language Learning the contexts and communities of practice in which they operate. We believe that our understanding advances best where theories are freely debated and challenged. As later chapters show, we accommodate a range of linguistic, cognitive, sociocultural and poststructuralist perspectives. But in all cases, we would expect to find the following: 1. Clear and explicit statements about the ground the theory aims to cover and the claims it is making; 2. Systematic procedures for confirming/disconfirming the theory, through data gathering and interpretation: the claims of a good theory must be testable/falsifiable in some way; 3. Not only descriptions of L2 phenomena, but attempts to explain why they are so, and to propose mechanisms for change, i.e. some form of transition theory; 4. Last but not least, engagement with other theories in the field, and serious attempts to account for at least some of the phenomena which are “common ground” in ongoing public discussion (VanPatten & J. Williams, 2015). Remaining sections of this chapter offer a preliminary overview of numbers of these. (For fuller discussion of rationalist evaluation criteria, see Gregg, 2003; Hulstijn, 2014; Jordan, 2004, pp. 87–122; Sealey & Carter, 2004, pp. 85–106; and for a poststructuralist perspective on theory in second language acquisition and applied linguistics, see McNamara, 2012; S. Talmy, 2014.) 1.3 Views on the Nature of Language 1.3.1 Levels of Language Linguists have traditionally viewed language as a complex communication system, which must be analysed on a number of levels (or subcomponents), such as phonology, morphology, lexis, syntax, semantics, pragmatics, discourse. (Readers unsure about this basic descriptive terminology will find help from the Glossary, and in more depth from an introductory linguistics text, such as Fromkin, Rodman, & Hyams, 2017.) They have differed about the extent of interconnections between these levels; for example, while, e.g., Chomsky argued at one time that “grammar is autonomous and independent of meaning” (1957, p. 17), another tradition initiated by the British linguist Firth claims that “there is no boundary between lexis and grammar: lexis and grammar are interdependent” (Stubbs, 1996, p. 36). (See also our discussion of O’Grady’s work in Chapter 4.) In examining different perspectives on SLL, we will first of all be looking at the levels of language which they attempt to take into account. (Does language learning start with words or with pragmatics?) We will also examine the degree of integration or separation that the theories assume, across Second Language Learning 7 various levels of language. We will find that the control of syntax and morphology is commonly seen as central to language learning, and that most general L2 theories try to account for development in this area. Other levels of language receive much more variable attention, and some areas are commonly treated in a semi-autonomous way, as specialist fields. This is often true for L2 pragmatics, lexical development and phonology, for example: see Kasper and Rose (2002), Bardovi-Harlig (2012, 2017) or Taguchi and Roever (2017) on pragmatics; Daller, Milton, and Treffers-Daller (2007), Kroll and Ma (2017), Meara (2009), Schmitt (2008) or Webb and Nation (2017) on vocabulary; Colantoni, Steele, and Escudero (2015), Derwing and Munro (2015), Eckman (2012) and Moyer (2013) on phonology and L2 pronunciation. As a consequence of the focus on morphosyntax of many L2 theorists, both those concerned with property theories and those concerned with transition theories, our own attention in much of what follows reflects this. Indeed, in our view, some of the most controversial and theoretically stimulating challenges have been thrown up in the area of learning morphosyntax. However, as noted earlier, an increasing number of theories are more explicitly integrating the lexicon with morphosyntax (on this, see Chapters 3 and 4 in particular, and also the MOGUL framework discussed in Chapter 10). 1.3.2 Competence and Performance Throughout the 20th century, theorists changed their minds about their approach to language data. Should this be the collection and analysis of actual attested samples of language in use, for example by recording and analyzing people’s speech? The structuralist linguistics tradition of the early 20th century leaned towards this view. Or should it be to theorize underlying principles and rules which govern language behaviour, in its potentially infinite variety? The linguist Noam Chomsky famously argued that it is the business of theoretical linguistics to study and model underlying language competence, rather than the performance data of actual utterances which people have produced (Chomsky, 1965). By competence, Chomsky was referring to an abstract representation of language knowledge hidden inside our minds, with the potential to create and understand original utterances in a given language (rather than sets of stored formulae or patterns). Much of the Chomsky-inspired research discussed in Chapter 3 indeed concerns itself with exploring L2 competence in this sense. However, even if the competence/performance distinction is accepted, there are clearly difficulties in studying competence. Performance data is seen as only an imperfect reflection of competence; for Chomsky himself, the infinite creativity of an underlying system can never adequately be reflected in a finite sample of speech or writing (1965, p. 18). Researchers interested in exploring underlying competence have not generally taken much interest in the analysis of linguistic corpora, for example (see below). Instead, 8 Second Language Learning they are likely to believe that competence is best accessed indirectly and under controlled conditions, through experimental tasks such as sentencecompletion, eye-tracking or grammaticality judgement tests (roughly, tests in which people are offered sample sentences, which are in (dis)agreement with the rules proposed for the underlying competence, and invited to say whether they judge them to be acceptable or not: Ionin, 2012). What exactly is being measured in such tasks is regularly debated (Gutiérrez, 2013; Plonsky, Marsden, Crowther, Gass, & Spinner, in press). This split between competence and performance has never been universally accepted, however, with, e.g., linguists in the British tradition of Firth and Halliday arguing for radically different models. Firth himself described such dualisms as “a quite unnecessary nuisance” (Firth, 1957, p. 2n, quoted in Stubbs, 1996, p. 44). In the Firthian view, the only option for linguists is to study language in use, and there is no opposition between language as system and observed instances of language behaviour; the only difference is one of perspective. Of course, the abstract language system cannot be “read” directly off small samples of actual text, any more than the underlying climate of some geographical region of the world can be modelled from today’s weather (a metaphor of Michael Halliday, quoted in Stubbs, 1996, pp. 44–45).The development of corpus linguistics has challenged the competence-performance distinction and has revitalized the writing of observation-based, “probabilistic” grammars (Conrad, 2010; Hunston & Francis, 2000). In this form of linguistics, very large corpora (databases) comprising millions of words of running text are collected, stored electronically and analysed with a growing range of software tools. New descriptions of English grounded in corpus analysis have provided greatly enhanced performance-based accounts of the grammar and vocabulary of spoken language and of variation among spoken and written genres (Biber & Reppen, 2015; Carter & McCarthy, 2006; Dang, Coxhead, & Webb, 2017; O’Keefe & McCarthy, 2010). In L1 acquisition research, the CHILDES project has made extensive child language corpora available in an increasing number of languages, and is a central tool in contemporary research (MacWhinney, 2000, 2007).Within the field of L2 learning, large new learner corpora are also becoming available, which can be analysed both from a bottom-up perspective (to find patterns in the data) and from a top-down perspective (to test specific hypotheses) (Myles, 2008, 2015; Granger, Gilquin, & Meunier, 2015). More recently, emphasis is shifting towards the integration of experimental and corpus-based approaches in computational linguistics (Rebuschat, Meurers, & McEnery, 2017). In making sense of contemporary perspectives on SLL, then, we will also need to be aware of the extent to which a competence/performance distinction is assumed. This will have significant consequences for the research methodologies associated with various positions, for example the extent to which these pay attention to naturalistic samples and databases of learner language, spoken and written, or rely on more controlled and focused—but Second Language Learning 9 more indirect—testing of learners’ underlying knowledge. (For further discussion of the relationship between language use and language learning, see Section 1.4.8.) 1.3.3 Models of Language: Formalist, Functionalist and Emergentist A further debate in contemporary linguistics which is relevant to SLL theorizing has to do with whether language is viewed primarily as a formal or a functional system. From a formal linguistics perspective such as that adopted in structuralist or Chomskyan theory, language comprises a set of abstract elements (parts of speech, morphosyntactic features, phonemes and so on) which are combined together by a series of rules or procedures. Semantics forms part of this formal system, but does not drive it (for discussion see, for example, Rispoli, 1999). From a functionalist perspective, on the other hand, research and theorizing must start with the communicative functions of language, and functionalists seek to explain the structure of language as a reflection of meaning-making. For example, a speaker’s intention to treat a particular piece of information as already known to their interlocutor, or alternatively as new for them, is seen by theories such as Halliday’s systemic functional grammar as motivating particular grammar phenomena such as clefting (fronting a piece of information within a sentence: It was my mother who liked jazz). Theoretical linguists who have adopted this perspective in varying ways, and whose work has been important for both L1 and L2 research, include Givón (e.g. 1979, 1985), Halliday (e.g. Halliday & Matthiessen, 2014), Lakoff (1987), Langacker (1987) and L. Talmy (2000) (and see Chapter 7 for discussion of this perspective in L2 research). A third theoretical perspective which is important in L2 research is that of emergentism. From this viewpoint, language does not have fixed abstract, underlying representations. Rather, language is conceived of as emerging in a dynamic fashion from language use, and its form is strongly and continuously influenced by statistical patterns detected by the learner in the surrounding input. Emergentist perspectives are explored in Chapters 4 and 10. 1.3.4 Models of Language: Communicative Competence and CAF Sociolinguists and many language educators have long been interested in models of language proficiency which are somewhat broader than those discussed so far, and which take full account of the ability to use language appropriately in its social context. The most famous of these proposals is of course the “communicative competence” concept proposed by Dell Hymes (1972), and adapted for discussions of L2 learning by Canale and Swain (1980). The ongoing influence of these ideas can be traced in L2 learning research, in work on L2 pragmatics and on interactional competence, discussed here in Chapters 7 and 9. 10 Second Language Learning A newer integrative framework which has become quite widely used in L2 research to capture major aspects of L2 development is that of complexity, accuracy and fluency (the CAF framework). It reflects a general view that L2 proficiency is best understood as having multiple components, and has emerged as a leading framework which can be justified in terms of psycholinguistic theory (Skehan, 2009) and empirical support (Norris & Ortega, 2009). The components of CAF have been summarized as follows: Complexity is commonly characterized as the ability to use a wide and varied range of sophisticated structures and vocabulary in the L2, accuracy as the ability to produce target-like and error-free language, and fluency as the ability to produce the L2 with native-like rapidity, pausing, hesitation, or reformulation. (Housen, Kuiken, & Vedder, 2012, p. 2) There are now quite extensive debates around the definition of each of these CAF components and the best way to measure them: see, for example, Pallotti (2009, 2015) on syntactic complexity, De Clercq (2015) on lexical complexity, Lambert and Kormos (2014) on accuracy and Segalowitz (2010) on fluency. Versions of CAF are commonly used to conceptualize the L2 proficiency of advanced learners (as, for example, in Mitchell, TracyVentura, & McManus, 2017), and are applied in Dynamic Systems Theory research (see Chapter 10). 1.3.5 Debates around the Language Target Much 20th century linguistics followed the Chomskyan notion that the object of study should be the underlying competence of an “ideal speakerlistener” of each given language, and that the intuitions of the (educated) native speaker provide access to this. In turn, much SLL research has assumed that native speaker competence provides a convergent, single target for L2 development. However, as we shall see in Chapter 2, 1970s researchers urged that learners’ developing L2 competence should be seen as a language system in its own right, and not merely a defective copy of the target (Selinker, 1972). (But note, the very term “interlanguage” proposed for L2 systems in fact implied an in-between system in transition towards a native-like target: Larsen-Freeman, 2014.) These ideas were challenged in some quarters in later 20th century linguistics, and in turn they have also been challenged increasingly in L2 research. Corpus linguistics, cognitive linguistics and sociolinguistics have highlighted aspects of variability within “native speaker” usage (Hulstijn, 2015, Chapter 6), and complexity theorists have emphasized the dynamic nature of all language knowledge, defined as a “dynamic set of graded patterns emerging from use”, with some “emergent stabilities”, but by definition never fully acquired (Larsen-Freeman, 2011, pp. 52–53). Proponents of Second Language Learning 11 “multicompetence” have argued that multilingualism involves development of a merged language system, in which different languages (L1, L2, L3 . . .) mutually influence each other (Cook, 2008, 2016; Kroll & Ma, 2017).While others continue to hold that multilingualism involves acquiring and using (parts of) distinct language systems, there is general acknowledgement that “parallel monolingualism” (Heller, 2006, p. 5), in which fully developed languages sit alongside each other without mutual interaction, is an implausible way of thinking about language knowledge and language use. Finally, an increasing number of researchers concerned with the learning of English as a global language have rejected altogether the notion of a standard native speaker target, instead arguing that English as a lingua franca (ELF) is the prime target for most learners, and that ELF itself does not offer any fixed norm, but instead is “essentially hybrid and plurilingual in nature” (Jenkins, 2014, p. 51). More generally, Larsen-Freeman (2014) among many others argues that the prime goal of L2 learning is not to develop native speaker competence, but to develop L2 “capacity” (p. 214), i.e. the language resources needed to function effectively in a range of desired—and evolving— contexts, genres and speaker roles. Duff (2012, p. 410) points out that new terminology has emerged, reflecting this more open view of language learning goals and contexts: advanced L2 users, lingua franca speakers, multicompetent speakers and so on. These changing views of the language learning target are important for how we conceptualize the learning process, to which we now turn. 1.4 The Language Learning Process 1.4.1 Nature and Nurture Discussions about SLL have always been coloured by debates on human learning more generally. One of these is the nature-nurture debate. How much of human learning derives from innate predispositions, i.e. some form of genetic preprogramming, and how much of it derives from social and cultural influences as we grow up? In the 20th century, the best-known controversy on this issue concerning L1 learning involved the behaviourist psychologist B.F. Skinner and the linguist Noam Chomsky. Skinner took the view that language in all its essentials could be and was taught to the young child, by the same mechanisms which he believed accounted for other types of learning. (In Skinner’s case, the mechanisms were those envisaged by general behaviourist learning theory—essentially, the shaping of “habits” through repeated trial, error and reward. From this point of view, language could be learned primarily by imitating caregivers’ speech. More details of this argument are given in Chapter 2.) Chomsky, on the other hand, argued consistently that human language is too complex to be learned in its entirety from the evidence actually available to the child; we must therefore have some innate predisposition to 12 Second Language Learning expect natural languages to be organized in particular ways and not others. For example, all natural languages have word classes such as Noun and Verb, and permissible operations (such as movement) which apply to these word classes. It is this type of information which Chomsky doubts children could discover from scratch in the speech they hear around them. Instead, he argues that there must be some innate core of abstract knowledge about language form, which provides a foundation for all natural human languages. This core of knowledge is currently known as Universal Grammar (UG) (see Chapter 3). Here, it is enough to note that child language specialists now generally accept the basic notion of some innate predisposition to language, though views continue to differ as to whether the underlying grammatical core of language is learned by the distinctive mechanisms of UG, or “emerges” through exposure to and use of language using more general learning mechanisms. Other aspects of language development, not least which language(s) is/are actually learned, and many aspects of vocabulary and pragmatics, clearly must result from an interaction between innate and environmental factors. Whatever view is taken of the learning of the grammatical core, active involvement in language use is essential for the overall development of communicative competence. (See Ambridge & Lieven, 2011; N. C. Ellis, Römer, & O’Donnell, 2016; Foster-Cohen, 2009; Hawkins, 2008, for overviews of this debate.) How does the nature-nurture debate impact on L2 learning theories? If humans are endowed with an innate predisposition for language, then perhaps they should be able to learn as many languages as they need or want to, provided (important provisos!) that the time, circumstances and motivation are available. On the other hand, the environmental circumstances for L2 learning differ systematically from those for L1 learning, except where infants are reared from birth in multilingual surroundings. Should we be aiming to reproduce the “natural” circumstances of L1 learning as far as possible for the later L2 learner? This was a fashionable view in the 1970s, but one which downplayed some very real social, psychological, contextual and linguistic obstacles. In recent decades there has been a closer and more critical examination of “environmental” factors which seem to influence L2 learning; some of these are detailed briefly in Section 1.4.8, and elaborated in later chapters. 1.4.2 Modularity vs Unitary Views of Cognition A further issue of controversy for students of the mind has been the extent to which it should be viewed as modular or unitary. That is, should we see the mind as a single, flexible organism, with one general set of procedures for learning and storing different kinds of knowledge and skills (Deák, 2014)? Or is it more helpfully understood as a bundle of modules, with distinctive mechanisms relevant to different types of knowledge (Fodor, 1983)? Second Language Learning 13 The modular view has found significant support from within linguistics, though linguists may disagree on the number and nature of language modules to be found within the mind (Jackendoff, 1997, 2002; Sharwood Smith, 2017; Smith & Tsimpli, 1995). Regarding language acquisition, Chomsky’s general view is that not only is language too complex to be learned from environmental exposure (his criticism of Skinner), it is also too distinctive in its structure to be learnable by general cognitive means. UG is thus assumed to be endowed with its own distinctive mechanisms for learning, though there is continuing debate over their nature and relations with other, general mechanisms (Meisel, 2011; Yang, Crain, Berwick, Chomsky, & Bolhuis, 2017). The alternative view, that language “emerges” as a symbolic system among others through the working of general cognitive processes, has been further developed by numerous child language researchers (see, e.g., Lieven, 2016; MacWhinney & O’Grady, 2015; Tomasello, 2003). Neurolinguistic views can vary about the components of the brain that are involved, and how far specific subsystems and networks are responsible for different aspects of the entire set of mechanisms involved in learning, storing and retrieving the different levels (components) of language and their functions. Different brain networks are thought to come into play for different types, contexts and even styles of learning (discussed a little more in Chapter 5). 1.4.3 Modularity and L2 Learning The possible role of an innate, specialist language module in the mind that supports L2 as well as L1 has been much discussed. If distinctive language learning mechanisms indeed exist, there are four logical possibilities: 1. That they continue to operate during L2 learning, in the same way that they make L1 learning possible; 2. That after the acquisition of the L1 in early childhood, these mechanisms cease to be operable, and the L2 must be learned by other means; 3. That the mechanisms themselves are no longer operable, but that the L1 provides a model of a natural language and how it works, which can be “copied” in some way when learning the L2. 4. That distinctive learning mechanisms for language remain available, but only in part, and must be supplemented by other means. (From a UG point of view, this would mean that UG was itself modular, with some modules still available and others not.) The first position was popularized by Stephen Krashen in the 1970s, in a basic form (see Chapter 2). This strand of theorizing has been revitalized by the continuing development of Chomsky’s UG proposals, and active debates continue on the related points 3 and 4 (see Chapter 3). Proposals for L2 transition theories compatible with UG pay increasing attention to the 14 Second Language Learning psycholinguistics of L2 processing (Sharwood Smith et al., 2013; Slabakova, 2016, Chapter 12). On the other hand, thinking about those general learning mechanisms which may be operating at least for L2 adult learners (if not for all learners) has also developed considerably further, since the proposals of McLaughlin (1987, pp. 133–153).The work of the cognitive psychologist J.R. Anderson on human learning, from an information processing perspective, and related proposals for a distinction between declarative and procedural forms of knowledge, have attracted longstanding interest and have been applied to various aspects of SLL by different researchers (O’Malley & Chamot, 1990; Towell & Hawkins, 1994; Ullman, 2015a, 2015b). Following their emergence in L1 acquisition, usage-based or emergentist learning theories are now prominent also in L2 research. There is by now a family of such theories, which have in common the view that L2 learning is primarily driven by exposure to L2 input, and that learners “induce” the rules of their L2 from the input by general learning mechanisms (N. C. Ellis & Wulff, 2015;Wulff & N. C. Ellis, 2018). Usage-based theories include, for example, “construction learning”, that is, the piecemeal learning of pairings of L2 forms and functions, from the level of individual morphemes to phrases and idioms (N. C. Ellis, 2017; N. C. Ellis & Ferreira-Junior, 2009; N. C. Ellis, Römer, & O’Donnell, 2016). Another version of usage-based theory is connectionism or “statistical learning” (Rebuschat, 2013; Rebuschat & J. N. Williams, 2012), which views acquisition as “the absorption of statistical regularities in the environment through implicit learning mechanisms” (J. N. Williams, 2009, p. 328). Such statistical learning effects, tempered by the established L1 and individual differences, have been demonstrated for phonology and for the identification and production of words, morphosyntax and phrase structures. These general cognitive theories of learning, along with others, are reviewed in Chapters 4 and 5. 1.4.4 Systematicity and Variability in L2 Learning When the utterances produced by L2 learners are examined and compared with traditionally accepted target language norms, they are often condemned as being full of errors or mistakes. Indeed, language teachers have often viewed learners’ errors as the result of carelessness or lack of concentration. If only learners would try harder, surely their productions could accurately reflect the target language rules which they had been taught! In the mid 20th century, under the influence of behaviourist learning theory, errors were often viewed as the result of “bad habits”, which could be eradicated if only learners did enough rote learning and pattern drilling using target language models. As will be shown in more detail in Chapter 2, one of the big lessons which was learned from early L2 research is that though learners’ L2 utterances may depart from target language norms, they are by no means lacking in system. So-called errors and mistakes are often patterned. Some are due Second Language Learning 15 to the influence of the L1 or other known languages, but this is by no means true of all of them. Instead, there is a good deal of evidence that learners work their way along similar developmental pathways, from apparently “simple” versions of the L2, distant from the target, to progressively more elaborate and more target-like versions. One clear example of a so-called developmental sequence, which has been studied for a range of target languages since the 1970s, has to do with the formation of negative sentences. It has commonly been found that learners start off by tacking a negative particle of some kind on to the beginning or the end of an L2 utterance (No you play here). Next, they learn to insert a negative particle of some kind into the Verb Phrase (Mariana not coming today); and, finally, they learn to manipulate modifications to auxiliaries and other details of negation morphology, including placement of the negative particle following a finite verbal element (I can’t play that one) (English examples from R. Ellis, 2008, pp. 92–93). This kind of data has commonly been interpreted to show that, for parts of the L2 grammar at least, learners’ development follows a common route, even if the rate at which learners actually travel along the route may be different. Many commentators identify this systematicity as one of the key features which L2 learning theories are required to explain (e.g. VanPatten & J. Williams, 2015, pp. 9–11), and we will refer to it repeatedly throughout the book. (Ortega, 2014, reviews a series of studies of the acquisition of negation, showing very effectively how the same or similar developmental sequences can be interpreted rather differently, depending on the researcher’s theoretical perspective.) However, learner language (or interlanguage: Han & Tarone, 2014; Selinker, 1972) is not characterized only by systematicity. Learner language systems are frequently unstable and in course of change; that is to say, they are characterized also by degrees of variability (VanPatten & J. Williams, 2015, p. 10). Developmental sequences have been described in some areas, such as negation, English interrogatives or German word order (Meisel, 2011); however, in other domains, such as inflectional morphology, L2 developmental routes are much less clear, and ultimate attainment itself very variable (unlike in L1 acquisition). Furthermore, learners’ utterances may vary from moment to moment, in the choices of forms which are made, so that learners seem to switch between a selection of “optional” forms over lengthy periods of time. A well-known example offered by R. Ellis involves a child learner of L2 English who seemed to produce the utterances no look my card, don’t look my card interchangeably over an extended period (1985). Myles, Hooper, and Mitchell (1998) reported similar data from a classroom learner of L2 French, who variably produced forms such as non animal, je n’ai pas de animal within the same 20 minutes or so (to say that he did not have a pet; the correct French form should be je n’ai pas d’animal). Here, in contrast to the underlying systematicity earlier claimed for the development of rules of negation, we see performance varying quite substantially from moment to moment. 16 Second Language Learning Like systematicity, variability is also found in child L1 development. However, the variability found for L2 learners is much greater than that found for L1 learners; in later chapters we will see attempts to account for this phenomenon from different theoretical perspectives.These will include explanations in terms of linguistic optionality/indeterminacy (discussed in Chapter 3), the influence of processing loads, memory constraints, task-dependency and the L1 (Chapters 4 and 5), changes in form-function mappings (Chapter 7), interactional competence, social context and speech style (Chapter 9), and the dynamism of individual learning trajectories (Chapter 10). 1.4.5 Creativity and Routines in L2 Learning There is plenty of common-sense evidence that learners can put their L2 knowledge to creative use, even at the very earliest stages of L2 learning. It becomes most obvious that this is happening when learners produce utterances like non animal (no animal = “I haven’t got any pet”), which they are unlikely to have heard from any interlocutor. It seems most likely that the learner has produced it through an early mechanism for marking negation, in combination with some basic vocabulary. But how did this same learner manage to produce the near-target je n’ai pas de animal, with its negative particles correctly inserted within the Verb Phrase, within a few minutes of the other form? One likely explanation is that at this point the learner was reproducing an utterance that they have indeed heard before, which has been memorized as an unanalysed whole, i.e. a formulaic sequence or a prefabricated chunk. Work in corpus linguistics has led to the increasing recognition that formulaic sequences play an important part in everyday language use; when we talk, our utterances are a complex mix of creativity and prefabrication (Biber & Reppen, 2015). That is to say: “a language user has available to him or her a large number of semi-preconstructed phrases that constitute single choices, even though they might appear to be analyzable into segments” (Sinclair, 1991, p. 100). L1 acquisition research has documented the use of unanalysed chunks by young children (Lieven & Tomasello, 2008; Wray, 2002, 2008), though for L1 learners the contribution of chunks seems limited by processing constraints (i.e. the memory load involved in storing long sequences). For older L2 learners, memorization of lengthy sequences is more possible. (Think of those singers who successfully memorize and deliver entire songs in different languages, without necessarily being able to manipulate the language creatively for themselves.) Analysis of L2 data produced by classroom learners, in particular, seems to show extensive and systematic use of chunks to fulfil early communicative needs (Myles, 2004; Myles, Hooper, & Mitchell, 1998; Myles, Mitchell, & Hooper, 1999). Studies of informal learners also provide some evidence of chunk use, and the contribution of formulaic sequences to the learning of both L1 and L2 is now receiving more sustained attention, especially among Second Language Learning 17 theorists of usage-based learning (Buerki, 2016; N. C. Ellis & Ogden, 2017; N. C. Ellis, Simpson-Vlach, Römer, O’Donnell, & Wulff, 2015). 1.4.6 Incomplete Success, Fossilization and Ultimate Attainment Infants learning their L1(s) embark on the enterprise in widely varying social situations. Yet with remarkable uniformity, at the end of five years or so, they have achieved a very substantial measure of success. Teachers and students know that this is by no means the case with L2s, embarked on after these critical early years, and that few, if any, adult learners ever come to blend indistinguishably with a community of target language (monolingual) “native speakers”, even if they are strongly motivated to do so. If the eventual aim of the SLL process is to adopt native speaker usage, therefore, it is typified by incomplete success. Indeed, while some learners go on learning, and develop a language system very close to that of the L2 input, others seem to stabilize as users of an alternative system, no matter how many language classes they attend, or how actively they use their L2 for communicative purposes. The term “fossilization” has been proposed to describe this phenomenon (Han, 2014; Selinker, 1972), though this term has been seen as objectionable by some (e.g. Jenkins, 2007), and more neutral terms such as “end state”, “ultimate attainment” and “L2 user” are also regularly used. These variable long-term L2 outcomes are also significant “facts” about the process of L2 learning, which theory needs eventually to explain. As we will see, explanations of two basic types have been offered.The first group of explanations are psycholinguistic: the learning mechanisms available to the young child cease to work (at least partly) or work less effectively for older learners, and study and effort can rarely if ever recreate them. This is the view taken by some UG theorists (such as Meisel, 2011) and also cognitive theorists who believe that learning mechanisms change with age (DeKeyser, 2012) or who believe that the existence of an established language system (the L1) influences the working of learning mechanisms (N. C. Ellis & Wulff, 2015; Sharwood Smith & Truscott, 2014). The second group of explanations are sociolinguistic: older L2 learners do not necessarily have either appropriate opportunities for exposure and interaction or the motivation to identify completely with the L1 user community, but may instead value their distinctive identity as multilingual speakers, as members of an identifiable transnational group or as “lingua franca” speakers (Benson & Cooker, 2013; Block, 2007; Jenkins, 2007; Miller & Kubota, 2013).These ideas are discussed in more detail in relevant chapters. 1.4.7 Cross-Linguistic Influences in L2 Learning Everyday observation tells us that learners’ performance in a new language is influenced by the language, or languages, that they already know. This is 18 Second Language Learning routinely obvious from learners’ “foreign accent” (Moyer, 2013), i.e. pronunciation which bears traces of the phonology of their L1. It is also obvious when learners make certain characteristic mistakes, for example when a native speaker of English says something in French like je suis douze, an utterance parallel to the English “I am twelve”. (The correct French expression would be j’ai douze ans = I have twelve years.) This kind of phenomenon has been called language transfer. But how important is it, and what exactly is being transferred? SLL researchers have been through several “swings of the pendulum” on this question, as Gass put it (1996). Behaviourist theorists of the 1950s and 1960s viewed language transfer as an important source of error in L2 learning, because L1 “habits” were so tenacious and deeply rooted. The interlanguage theorists who followed in the 1970s downplayed the influence of the L1 in L2 learning, however, because of their preoccupation with identifying creative processes at work in L2 development; they pointed out that many L2 “errors” could not be traced to L1 influence, and were primarily concerned with discovering patterns and developmental sequences on this creative front. Theorists today, as we shall see, would generally accept once more that cross-linguistic influences play an important role in L2 learning and use, on all language levels from phonology to discourse (Ortega, 2009, pp. 31–54). Montrul (2014) points out that transfer is not only “a very salient feature of interlanguage grammar”, but may be multidirectional; that is, the grammar of the L2 may influence that of the L1 also; indeed, transfer can in the longer term lead to the development of new language varieties and language change more generally. However, we will still find widely differing views on the extent and nature of these cross-linguistic influences. For example, in Chapter 7 we visit the issue from a functionalist perspective, and find one group of researchers studying informal adult learners who argue that L1 influence is weak (Klein & Perdue, 1992), but also others who argue for ongoing mutual influences between all the learner’s languages (Cook, 2016; Stam, 2017; Vanek & Hendriks, 2014). Other researchers have claimed that learners with different L1s progress at somewhat different rates, and may follow different acquisitional routes, at least in some areas of the target grammar. For example, Ringböm has shown that L1 Swedish speakers can learn many aspects of L2 English at a faster rate than L1 Finnish speakers (Ringböm, 2007). A more general effect has also been observed in some multilingualism research (also known as “L3 acquisition research”), whereby learners of any third or fourth language seem to do so with added efficiency, and to be able to draw on all of the previous languages they may know, as sources of support for the newest language (Berkes & Flynn, 2016; Hufeisen & Jessner, 2009). Nevertheless, consistent with the idea that the amount of cross-linguistic influence is affected by the extent of similarity between one’s languages, a landmark study, with a staggering 39,300 multilingual speakers, found that typological distance between learners’ L1 and L3, and between their L2 and L3, Second Language Learning 19 explained, to a substantial extent, the proficiency they reached in L3 Dutch (Schepens, van der Slik, & van Hout, 2016). A UG perspective has its own distinctive implications for the phenomenon of language transfer (Lardiere, 2012). If L2 learners have continuing direct access to their underlying UG, L1 influence will affect only the more peripheral areas of L2 development. If, on the other hand, learners’ only access to UG is indirect, via the working example of a natural language which the L1 provides, then L1 influence lies at the heart of L2 learning.We review these alternatives in Chapter 3. 1.4.8 The Relationship between L2 Use and L2 Learning In Section 1.3.2, we considered the distinction between language competence and performance. Here, we look more closely at the relationship between using (i.e. performing in) an L2 and learning (i.e. developing one’s competence in) that same language. We should note first of all, of course, that “performing in” or “using” a language not only involves speaking or writing it. Making sense of the language which we hear (and read) around us is an equally essential aspect of performance/use. It is also obviously necessary to interpret and to process (= analyse, make sense of) incoming language data in some form, for language development to take place. There is thus general agreement around the common-sense view that language input is essential for normal language learning. Indeed, during the late 1970s and early 1980s, the more distinctive view was argued by Stephen Krashen and others that input (at the right level of difficulty) was all that was necessary for L2 acquisition to take place (Krashen, 1982, 1985: see discussion in Chapter 2). Input, and what learners do with it, has remained a central issue in L2 theorizing ever since. Krashen was unusual, however, in not seeing any central role for language production in his theory of L2 acquisition. Most other theoretical viewpoints support in some form the equally common-sense view that speaking a language is helpful for learning it. For example, behaviourist learning theory saw regular (oral) practice as helpful in forming correct language “habits”. A directly contrasting view to Krashen’s is the Output Hypothesis, advanced by Merrill Swain and colleagues (Swain, 1985, 1995, 2005). Swain originally pointed out (1985) that much input is comprehensible, without any need for a full grammatical analysis, particularly as L2 learners can often successfully guess at the likely meanings being expressed from contextual clues. If we don’t need to pay attention to the grammar, in order to understand the message, why should we be compelled to learn it? On the other hand, when we try to say something in the L2, we are forced to try out our ideas about how the target grammar actually works so as to express ourselves precisely. These ideas are covered in more detail in Chapter 6. 20 Second Language Learning Other contemporary theorists continue to lay stress on the “practice” function of language production, especially in building up fluency and control of an emergent L2 system (DeKeyser, 2015; Lyster & Sato, 2013: see Chapter 5 for fuller discussion.) So far in this section, we have seen that theorists can hold different views on the relative contributions of input and of output. However, another way of distinguishing among current theories of L2 learning from a “performance” perspective has to do with their view of L2 interaction—that is, their interpretation of the value for learning of events such as everyday L2 conversation, or online exchanges. Two major perspectives are found concerning SLL through interaction, one psycholinguistic, one sociolinguistic. From a psycholinguistic point of view, L2 interaction is mainly interesting because of the opportunities it seems to offer to individual L2 learners to fine-tune the language input they are receiving, and adapt it to their current state of development. What this means is that learners need the chance to talk with more fluent speakers in a fairly open-ended way, to ask questions and to clarify meanings when they do not immediately understand. Following early proposals by Michael Long (1983), conversational episodes involving the regular negotiation of meaning have been intensively studied by many of the interactionist researchers discussed in Chapter 6. Interaction is also interesting to linguistic theorists because of controversies over whether negative evidence is necessary or helpful for L2 development. By “negative evidence” is meant some kind of information that lets the learner know that a particular interlanguage form is not acceptable according to target language norms, such as a formal correction offered by a teacher, or a misunderstanding that impedes successful communication. Why is there a controversy about negative evidence in L2 learning? The problem is that overt correction often seems ineffective—and not (only) because L2 learners are lazy! It seems that learners cannot always benefit from correction, but may continue to produce the same forms despite feedback being offered. Also, explicit negative evidence has been argued to be largely absent from most L1 learning contexts. For some theorists, language must therefore be learnable from positive evidence alone (evidence of what is acceptable), and corrective feedback is largely irrelevant (Truscott, 2007). Many others continue to see value in negative evidence, though its usefulness may differ for different aspects of the learner’s emerging L2 system (Lyster, Saito, & Sato, 2013). These different (psycho)linguistic views have one thing in common, however: they view the learner as operating and developing a relatively autonomous L2 system, and see interaction as a way of feeding that system with more or less fine-tuned input data. Sociolinguistic views of interaction are very different. Here, the language learning process is viewed as essentially social; both the identity of the learner and their language knowledge are collaboratively constructed and reconstructed in the course of interaction (Duff, 2011; Pekarek Doehler & Pochon-Berger, 2015). The details of how Second Language Learning 21 this “interactional competence” is understood to develop vary from one theory to another, as we shall see in Chapters 8 and 9. 1.5 Views of the Language Learner Who is the L2 learner, and how are they introduced to us, in current L2 research? We have already made it clear that the infant bilingual is not the subject of this book. Instead, “L2” research generally deals with learners who embark on the learning of an additional language at least some years after they have started to acquire their L1. So, L2 learners may be children or adults; they may be learning the target language formally in school or “picking it up” in the playground, online or at work. They may be learning a highly localized language, which will help them to become insiders in a local speech community; or the target language may be a language of wider communication relevant to mobility and broader social aspirations, which gives access to employment and public life. Indeed, in the first part of the 21st century, the target language is highly likely to be English; estimates suggest that while around 5% of the world’s population (c. 350 million) speak English as their L1, between one and two billion are using it as an L2 or a lingua franca, or learning to do so (Graddol, 2006, p. 98). Consequently, much research on L2 learning, whether with children or adults, is concerned with English, or with a small number of other languages with global reach (French, German, Japanese, Mandarin, Spanish . . .).There are many multilingual communities today (e.g. townships around fast-growing mega-cities, transnational communities arising from global migration flows, or online gaming communities) where L2 learning can involve a much wider range of languages. However, these have been comparatively little studied. It is possible to distinguish three main points of view among L2 researchers as far as the learner is concerned: the linguistic and psycholinguistic perspective, which is concerned with modelling language structures and processes within the mind; the social psychological perspective, which is concerned with modelling individual differences among learners, and their implications for eventual learning success; and the sociocultural perspective, which is concerned with learners as social beings and members of social groups and networks. 1.5.1 The Learner as Language Processor Linguists and psycholinguists have typically been concerned primarily with analyzing and modelling the inner mental mechanisms available to the individual learner, for processing (making sense of), learning and storing new language knowledge. Their general aim is to document and explain the developmental route along which learners travel and their degree of 22 Second Language Learning ultimate success. Researchers for whom this is the prime goal are less concerned with the speed or rate of development.Thus, they tend to minimize or disregard social and contextual differences among learners; their aim is to document universal mental processes available to all normal human beings. As we shall see, however, there is some controversy among researchers in this psycholinguistic tradition on the question of age. Do child and adult L2 learners learn in essentially similar ways? Or is there a critical age which divides younger and older learners, a moment when early learning mechanisms atrophy and are replaced or at least supplemented by other compensatory ways of learning? Many L2 researchers agree with some version of a view that “younger = better in the long run” (Singleton, 1995, p. 3), while others argue that this debate is far from resolved (for recent accessible overviews, see Cook & Singleton, 2014, Chapter 3; R. Ellis, 2015, Chapter 2; Jaekel, Schurig, Florian, & Ritter, 2017; Muñoz & Singleton, 2011). Some possible explanations for age differences are discussed in Chapters 3 and 5. 1.5.2 Differences between Individual Learners Real-life observation quickly tells us L2 learners differ greatly in their rate of learning and ultimate attainment. Psychologists have argued consistently that these differences must be due at least in part to individual differences among learners, and many proposals have been made concerning these. For fuller overviews of these proposals, and surveys of related research, we refer the reader to sources such as Dewaele (2009), Dörnyei and Ryan (2015), R. Ellis (2015, Chapter 3), Roberts and Meyer (2012) and M. Williams, Mercer, and Ryan (2015). As Dewaele remarks, nobody has yet come up with any “Grand Unified Theory of Individual Differences” (2009, p. 625). Here we introduce a selection of the most prominent cognitive and affective (emotional) factors which have been claimed to influence aspects of the L2 learning process and/or ultimate attainment. Language aptitude: Is there really such a thing as a “gift” for L2 learning, distinct from general intelligence, as folk wisdom often holds? The most famous formal test of language aptitude was designed in the 1950s, by Carroll and Sapon (1957, in Skehan, 2012, p. 393).This “Modern Language Aptitude Test” (MLAT) was grounded in a four-factor view of language learning aptitude developed by the social psychologist John B. Carroll. The aptitude factors proposed by Carroll were (a) phonetic coding ability, (b) grammatical sensitivity, (c) inductive language learning ability and (d) associative memory abilities. The Carroll view of aptitude reflected the behaviourist language learning theory of the day, and its view of memory in particular is now outdated. However, the MLAT and more recent tests (Linck et al., 2013) have remained broadly robust predictors of SLL success, for learners instructed using varying methods including “communicative” approaches, and also for informal language learners (Granena, 2013). In a recent meta-analysis, Second Language Learning 23 Li (2016) has confirmed the existence of language aptitude as a distinct construct with strong predictive power for general L2 proficiency. The general claim that a distinctive language aptitude exists has gained further support from research investigating the relationship between L1 development, L2 proficiency and L2 aptitude, in classroom contexts. An early longitudinal study by Skehan (1986) demonstrated a significant relationship between early L1 development measures and L2 aptitude measures for the same children when learning a foreign language 10 years later. Research by Sparks and associates also tracked a cohort of American children through early L1 literacy instruction and later foreign language instruction. These scholars have shown through a series of repeated tests (including MLAT) that L1 literacy skills are strong predictors of both L2 aptitude and eventual L2 proficiency, at least in a classroom context, while factors such as general intelligence and classroom anxiety played a much more limited role. (See Sparks, 2012, for a review.) Finally, new studies of classroom learning by identical and non-identical twins have also suggested the existence of a specific L2 aptitude somewhat distinct from both L1 ability and intelligence (Dale, Harlaar, & Plomin, 2012).The concept of aptitude is given fuller consideration in Chapter 5. Memory systems: Among the individual traits which have been seen as part of the “language aptitude” construct, one type of memory system, working memory (WM), has attracted a large amount of attention. Many L2 researchers have worked with the proposals of Baddeley (2007), which distinguish long-term memory and WM from each other and which visualize WM as “a limited capacity, mental workspace that regulates our ability to consciously code, store, and process information” (Serafini, 2017, p. 371), of course including language information. A number of studies reviewed by Serafini (2017) have found that learners with stronger WM capacity (as measured by various types of memory test) perform better in a range of L2 domains (oral production, processing morphosyntax and others).The role of memory systems is central to current cognitive theories of L2 processing and development, including the idea that individuals may have different capacities in different types of memory subsystems and that these can change over time, examined further in Chapter 5. Language learning strategies: Do more successful language learners set about the task in some distinctive way? Do they have at their disposal some special repertoire of ways of learning, or strategies? If this were true, could these even be taught to other, hitherto less successful learners? From the 1970s onwards, numerous researchers have tried to identify the strategies supposedly used by learners at different levels (Dörnyei & Ryan, 2015, Chapter 6). Early research was grounded in observation and interviews with successful learners (Naiman, Fröhlich, & Todesco, 1978). Subsequent research developed more detailed taxonomies of learning strategies, which were then incorporated into questionnaires to elicit learners’ reported behaviours. The best known are those of Oxford (1990, 2011a) and of O’Malley and Chamot 24 Second Language Learning (1990). Oxford has defined learning strategies as “the learner’s goal-directed actions for improving language proficiency or achievement, completing a task, or making learning more efficient, more effective, and easier” (2011b, p. 167). Her original taxonomy included six groups of strategies, illustrated below: Memory strategies Cognitive strategies Compensation strategies Metacognitive strategies Affective strategies Social strategies e.g. “creating mental images” e.g. “analyzing and reasoning”, “practising” (both repetition and natural practice) e.g. “guessing intelligently”, “adjusting the message” e.g. “setting goals and objectives”, “self-evaluating” e.g. “taking risks wisely”, “rewarding yourself ” e.g. “cooperating with peers”, “asking for clarification or verification” (Oxford, 1990, pp. 18–21) Research on the usefulness of learning strategies for language development has been partly informed by information processing theory—the idea that knowledge about a strategy can be learned as a “fact”, practised and automatized—which is discussed further in Chapter 5. Language attitudes: Social psychologists have long been interested in the idea that the attitudes of the learner towards the target language, its speakers and the learning context may all play some part in explaining success or lack of it. Research on L2 attitudes has largely been conducted within the framework of broader research on motivation, and empirical research has shown—unsurprisingly—that favourable attitudes alone are not a strong predictor of achievement, unless accompanied by active engagement and learning effort (Masgoret & Gardner, 2003). Similarly, attitudes have not been shown to play any clear independent role in L2 attrition (Schmid & Mehotcheva, 2012). Motivation: Research into L2 motivation was pioneered from the 1970s by the Canadian social psychologist Robert C. Gardner and associates (e.g. Gardner, 1985, 2010). For these researchers, motivation is defined by three main components: “desire to achieve a goal, effort extended in this direction, and satisfaction with the task” (Gardner & MacIntyre, 1993, p. 2). Gardner and his Canadian colleagues carried out a long programme of work on motivation with English-Canadian school students learning French as an L2, and developed a range of questionnaires to measure motivation. Over the years consistent relationships have been demonstrated between language attitudes, motivation and L2 achievement, with the strongest relationships obtaining between motivation and achievement (Masgoret & Gardner, 2003). These researchers also proposed the well-known distinction between integrative Second Language Learning 25 and instrumental motivation. Integrativeness has been defined as “an open and accepting orientation toward the other language community and other communities in general” (Gardner, 2010, p. 202); it has consistently shown itself to be a powerful predictor of L2 learning success. Instrumental motivation reflects the belief that language learning will bring concrete benefits (e.g. a better job). More recently the Gardner tradition has been critiqued in a number of respects, using ideas from general educational psychology. Greater attention has been given to the importance of the learning context in shaping motivation, in particular to the motivation of classroom learners (Dörnyei, 1994, 2001; Dornyei & Kubanyiova, 2014; M. Williams et al., 2015). Increasing attention has also been given to the idea that L2 motivation is dynamic and alterable, and has a close relationship with learner identity (MacIntyre & Serroul, 2015). Indeed, Dörnyei, Ushioda and others now propose that motivation is best viewed within a broader “complex dynamic systems” perspective on L2 learning (Dörnyei & Ushioda, 2011; Dörnyei, MacIntyre, & Henry, 2015: see Chapter 10). In line with increased questioning of “native speaker” competence as the ultimate target for L2 learning, the concept of integrative motivation has also been questioned, and it is acknowledged that contemporary learners may be motivated by a desire for an international identity as a lingua franca or plurilingual speaker, rather than specific aspirations to integrate with a native speaker community. Dörnyei and Al-Hoorie (2017) discuss these questions from the perspective of learners of languages other than English; the motivation-identity link is discussed further in Chapter 9. Finally, Dörnyei and associates have tried to sum up these developments through their proposals for the “L2 motivational self system” (Csizér & Dörnyei, 2005; Dörnyei, 2009; Dörnyei & Ryan, 2015, Chapter 4; Henry, 2015). This model proposes that learners make their decisions about how to act primarily with reference to an ideal self, i.e. the imagined person that they would like to be; when this ideal self is a proficient L2 user, whether for integrative, instrumental or transnational reasons, learners are more likely to invest the necessary effort to become so. Affect, anxiety and willingness to communicate: Heightened anxiety is a commonly reported experience for the L2 learner, whether in the classroom or outside it. But is this anxiety solely a temporary phenomenon, attaching to particular situations? Some social psychologists have viewed language anxiety as “a stable personality trait referring to the propensity for an individual to react in a nervous manner when speaking . . . in the second language” (Gardner & MacIntyre, 1993, p. 5). However, a special form of anxiety can also attach to L2 use, i.e. “foreign language anxiety” (Horwitz, Horwitz, & Cope, 1986), and it is this specific form of anxiety which has been shown to affect academic, cognitive and social aspects of SLL (MacIntyre, 2017). As M. Williams et al. (2015) remind us, “using a foreign language is closely connected with self-expression and if we feel limited in our ability to communicate personally meaningful messages,then we may feel that we are not projecting ...an 26 Second Language Learning accurate reflection of ourselves” (p. 87).The anxious learner may be less willing to speak in class, or to engage target language speakers in informal interaction; they may actually process the L2 less efficiently, with negative consequences for development. This issue has typically been investigated through questionnaires, e.g. using the Foreign Language Classroom Anxiety Scale (Horwitz et al., 1986). There are numerous studies which suggest that language anxiety has a negative relationship with learning success (see review by MacIntyre, 2017). Some researchers have queried whether anxiety actually causes reduced success, and suggested that it is equally likely that poor achievers/communicators will be anxious, a circular debate that is difficult to resolve through correlational, questionnaire-based studies. In a longitudinal study which tracked L1 literacy development among American schoolchildren as well as their L2 aptitude, proficiency and anxiety, Sparks and Ganschow (2007) showed that early L1 literacy achievement is a very strong predictor of both L2 proficiency and L2 anxiety, in later schooling; from this they conclude that anxiety arises primarily from poor achievement, and not the other way around. MacIntyre (2017) remains sceptical about this conclusion, but agrees that more longitudinal and experimental research is needed to resolve such debates. Finally, a broad construct “willingness to communicate” (WTC) has also been proposed as a mediating individual factor in both L2 use and L2 learning (MacIntyre, Dörnyei, Clément, & Noels, 1998). The WTC construct includes variables ranging from personality traits and general L2 confidence to immediate contextual variables such as the desire to communicate with a particular person. In combination, these variables produce “the intention to initiate communication, given a choice” (MacIntyre et al., 1998). WTC is clearly relevant to current versions of motivation theory. Like other areas of research on individual differences, much WTC research is currently exploring more integrated and flexible models of learner development, within the framework of Dynamic Systems Theory, which we discuss in Chapter 10 (MacIntyre & Legatto, 2011;Yashima, MacIntyre, & Ikeda, 2018). 1.5.3 The Learner as Social Being The two perspectives on the learner which we have highlighted so far have concentrated (a) on universal characteristics and (b) on individual characteristics. But the L2 learner is also a social being, taking part in structured social networks and social practices. After early decades when psycholinguistic and individualist perspectives on L2 learners predominated, recent research is redressing the balance through the so-called social turn in L2 research (Block, 2003; Douglas Fir Group, 2016: see Chapters 8 and 9). Two major characteristics distinguish this social view of the learner from the “individual differences” view which we have just dipped into. Firstly, interest in the learner as a social being leads to the concept of a multilingual identity, including a range of socially constructed dimensions of that identity, and their relationship with learning—so, for example, Second Language Learning 27 social class, power, ethnicity and gender make their appearance as potentially significant for L2 research. Identity itself may be seen as in flux throughout the language learning journey: “a dynamic and shifting nexus of multiple subject positions or identity options” (Pavlenko & Blackledge, 2004, p. 35). Secondly, the relationship between the individual learner and the social context of learning is also viewed as dynamic, reflexive and constantly changing, a matter of engagement in social and discourse practices.The classic “individual differences” tradition saw that relationship as being governed by a bundle of learner traits or characteristics (such as aptitude, or anxiety), which have been viewed as relatively fixed and slow to change. More socially oriented researchers increasingly lay stress on learner agency, i.e. the learner’s capacity to choose learning goals, and to shape their environment and learning opportunities (Deters, Gao, Miller, & Vitanova, 2014; Duff, 2012). These views are most clearly expressed by “poststructuralist” researchers such as Norton (2017), whose work is discussed in Chapter 9. 1.6 Links with Social Practice Is L2 theory useful? Does it have any immediate practical applications in the real world, most obviously in the L2 classroom? In our field, theorists have been divided on this point. Beretta and associates argued for “pure” theory building in SLL, uncluttered by requirements for practical application (1993). Van Lier (1994), Rampton (1995) and others have argued for a socially engaged perspective, where theoretical development is rooted in, and responsive to, social practice, and language education in particular, and such calls continue (Douglas Fir Group, 2016). Many, from Krashen (1985) onwards, have argued that L2 teaching in particular should be guided systematically by L2 research findings. This tension has partly been addressed by the emergence of “instructed language learning”, “task-based learning” and “processing instruction” as distinct sub-areas of research (see, e.g., surveys and discussion by Bryfonski & McKay, 2017; R. Ellis, 2016, 2017; Loewen, 2015; Loewen & Sato, 2017; Long, 2017;VanPatten, 2017). Some of the research traditions surveyed in later chapters also explicitly promote pedagogical applications of their espoused theories; this is especially true of social psychological research on motivation (discussed earlier in this chapter), of some interactionist perspectives (Chapter 6), of cognitive linguistics (Chapter 7) and of sociocultural theory (Chapter 8). Overall, we think that language teachers who read this book will themselves want to take stock of the relations between the theories we survey and their own beliefs and experiences in the classroom. They will, in other words, want to make some judgement on the “usefulness” of theorizing in making sense of their own experience and their practice, while not necessarily changing it (Marsden & Kasprowicz, 2017). In our general conclusions to this book, therefore, we will end with some brief 28 Second Language Learning consideration of the connections we ourselves perceive between learning theory and classroom practice. 1.7 Conclusion This chapter has introduced a range of recurrent concepts and issues which most theorists agree will have to be taken into account if we are to arrive eventually at any complete account of SLL. In Chapter 2 we provide a brief narrative account of the recent history of SLL research, plus a chronological timeline of key publications in the field. We then move in the remaining chapters of the book to a closer examination of a number of broad perspectives, or families of theories, with their distinctive views of the key questions to be answered and key phenomena to be explained. 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