Research on second language acquisition (SLA) has identified language aptitude and age of onset (AO), i.e., the age at which learners are first meaningfully exposed to the L2, as robust predictors of rate of classroom language learning and level of ultimate L2 attainment in naturalistic settings, respectively. It is not surprising, therefore, that recent years have witnessed a surge of interest in the combination of age and aptitude as a powerful explanatory factor in SLA, and central to a viable SLA theory. The chapters in this volume provide new studies and reviews of research findings on age effects, bilingualism effects, maturational constraints and sensitive periods in SLA, the sub-components of language aptitude and the development of new aptitude measures, the influence of AO and aptitude in combination on SLA, aptitude-treatment interactions, and the implications of the research findings for language education policy and tailored language instruction.

Research on second language acquisition (SLA) has identified language aptitude and age of onset (AO), i.e., the age at which learners are first meaningfully exposed to the L2, as robust predictors of rate of classroom language learning and level of ultimate L2 attainment in naturalistic settings, respectively. It is not surprising, therefore, that recent years have witnessed a surge of interest in the combination of age and aptitude as a powerful explanatory factor in SLA, and central to a viable SLA theory. The chapters in this volume provide new studies and reviews of research findings on age effects, bilingualism effects, maturational constraints and sensitive periods in SLA, the sub-components of language aptitude and the development of new aptitude measures, the influence of AO and aptitude in combination on SLA, aptitude-treatment interactions, and the implications of the research findings for language education policy and tailored language instruction.

A comprehensive, current review of the research and approaches to advanced proficiency in second language acquisition The Handbook of Advanced Proficiency in Second Language Acquisition offers an overview of the most recent and scientific-based research concerning higher proficiency in second language acquisition (SLA). With contributions from an international team of experts in the field, the Handbook presents several theoretical approaches to SLA and offers an examination of advanced proficiency from the viewpoint of various contexts and dimensions of second language performance. The authors also review linguistic phenomena among advanced learners through the lens of phonology and grammar development. Comprehensive in scope, this book provides an overview of advanced proficiency grounded in socially-relevant domains of second language acquisition including discourse, reading, genre-based writing, and pragmatic competence. The authoritative volume brings together the theoretical accounts of advanced language use combined with solid empirical research. Includes contributions from an international collection of noted scholars in the field of second language acquisition Offers a variety of theoretical approaches to SLA Contains information on the most recent empirical research that contributes to an understanding of SLA Describes performance phenomena according to multiple approaches to SLA Written for scholars, students and linguists, The Handbook of Advanced Proficiency in Second Language Acquisition is a comprehensive text that offers the most recent developments in the study of advanced proficiency in the acquisition of a second language.

Whether we grow up with one, two, or several languages during our early years of life, many of us will learn a second, foreign, or heritage language in later years. The field of Second language acquisition (SLA, for short) investigates the human capacity to learn additional languages in late childhood, adolescence, or adulthood, after the first language --in the case of monolinguals-- or languages --in the case of bilinguals-- have already been acquired. Understanding Second Language Acquisition offers a wide-encompassing survey of this burgeoning field, its accumulated findings and proposed theories, its developed research paradigms, and its pending questions for the future. The book zooms in and out of universal, individual, and social forces, in each case evaluating the research findings that have been generated across diverse naturalistic and formal contexts for second language acquisition. It assumes no background in SLA and provides helpful chapter-by-chapter summaries and suggestions for further reading. Ideal as a textbook for students of applied linguistics, foreign language education, TESOL, and education, it is also recommended for students of linguistics, developmental psycholinguistics, psychology, and cognitive science. Supporting resources for tutors are available free at www.routledge.com/ortega.

This book pioneers the study of bilingualism across the lifespan and in all its diverse forms. In framing the newest research within a lifespan perspective, the editors highlight the importance of considering an individual's age in researching how bilingualism affects language acquisition and cognitive development. A key theme is the variability among bilinguals, which may be due to a host of individual and sociocultural factors, including the degree to which bilingualism is valued within a particular context.Thus, this book is a call for language researchers, psychologists, and educators to pursue a better understanding of bilingualism in our increasingly global society.

Language Aptitude: Advancing Theory, Testing, Research and Practice brings together cutting-edge global perspectives on foreign language aptitude. Drawing from educational psychology, cognitive science, and neuroscience, the editors have assembled interdisciplinary authors writing for an applied linguistics and education audience. The book is broken into five major themes: revisiting and updating current language aptitude theories and models; emerging insights from contemporary research into language aptitude and the age factor or the critical period hypothesis; redefining constructs and broadening territories of foreign language aptitude; exploring language aptitude from a neurocognitive perspective; and exploring future directions of foreign language aptitude research. Focused on critical issues in foreign language aptitude and second language learning and teaching, this book will be an important research resource and supplemental reading in both applied linguistics and cognitive psychology.

An introduction to the key questions that drive the field of L2 acquisition research, including its historical foundations.

Provides a comprehensive, up-to-date account of language aptitude theories, test development, research paradigms and practical implications.

Now in a fifth edition, this bestselling introductory textbook remains the cornerstone volume for the study of second language acquisition (SLA). Its chapters have been fully updated, and reorganized where appropriate, to provide a comprehensive yet accessible overview of the field and its related disciplines. In order to reflect current developments, new sections and expanded discussions have been added. The fifth edition of Second Language Acquisition retains the features that students found useful in previous editions. This edition provides pedagogical tools that encourage students to reflect upon the experiences of second language learners. As with previous editions, discussion questions and problems at the end of each chapter help students apply their knowledge, and a glossary defines and reinforces must-know terminology. This clearly written, comprehensive, and current textbook, by Susan Gass, Jennifer Behney, and Luke Plonsky, is the ideal textbook for an introductory SLA course in second language studies, applied linguistics, linguistics, TESOL, and/or language education programs. This textbook is supported with a Companion Website containing instructor and student resources including PowerPoint slides, exercises, stroop tests, flashcards, audio and video links: https://routledgetextbooks.com/textbooks/9781138743427/

This Handbook, with 45 chapters written by the world’s leading scholars in second language acquisition (SLA) and language testing, dives into the important interface between SLA and language testing: shared ground where researchers seek to measure second language performance to better understand how people learn their second languages. The Handbook also reviews how to best measure and evaluate the second language (L2) learners’ personal characteristics, backgrounds, and learning contexts to better understand their L2 learning trajectories. Taking a transdisciplinary approach to research, the book builds upon recent theorizing and measurement principles from the fields of applied linguistics, cognitive science, psychology, psycholinguistics, psychometrics, educational measurement, and social psychology. The Handbook is divided into six key sections: (1) Assessment concepts for SLA researchers, (2) Building instruments for SLA research, (3) Measuring individual differences, (4) Measuring language development, (5) Testing specific populations, and (6) Measurement principles for SLA researchers.