The New Zealand research group has done a superb job of putting together in a coherent volume empirical studies on implicit and explicit L2 knowledge, a timely topic in SLA research. A full range of issues is covered including theory, definitions, measurement as well as the effects of instruction. Both novice and experienced researchers will finish reading this book with an excellent understanding of the central issues and with an excitement about the possibilities of doing research in this area. This book is a welcome addition to the growing body of studies on L2 knowledge types and will occupy an important place in university and private libraries.

(Susan Gass, University Distinguished Professor, Michigan State University)

What are the interactions, if any, between explicit and implicit language knowledge? The ‘Interface Question’ is the most fundamental issue of Applied Linguistics and Second Language Research. It determines how we should learn languages, how we should teach them, and how we should test proficiency. It is a fundamental theoretical question of Cognitive Science too. In this excellent volume, Rod Ellis and his colleagues in the Royal Society of New Zealand Marsden project take us through their extensive cognitive and psychometric research into the definition and measurement of implicit and explicit language knowledge, its acquisition, and its instruction.

(Nick Ellis, University of Michigan, USA)

My view of the book is that it is a must-have for any person interested in SLA. It represents the peak of collaborative effort in tackling the issues at hand…This book makes a valuable contribution to the field of SLA , and it will become an indispensable text for graduate students, researchers and language professionals alike.

(Darcy Sperlich, School of English of the Manukau Institute of Technology, in Auckland, New Zealand the LINGUIST List 22.578, 03/02/2011)

Rod Ellis is Professor of Applied Language Studies in the University of Auckland and a visiting Professor at Shanghai International Studies University. His publications includes articles and books on second language acquisition, language teaching and teacher education. His most recent is The Study of Second Language Acquisition 2nd Edition (Oxford University Press, 2008). He is also editor of the journal Language Teaching Research.

Shawn Loewen is an assistant professor in the Second Language Studies program at Michigan State University. He specializes in second language acquisition and L2 classroom interaction. His recent research has investigated the occurrence and effectiveness of incidental focus on form in a variety of L2 contexts.

Catherine Elder is Associate Professor in the School of Languages and Linguistics and Director of the Language Testing Research Centre at the University of Melbourne. She is coeditor (with Glenn Fulcher) of the journal Language Testing j. She is author with Alan Davies et. al. of the Dictionary of Language Testing and co-editor of Experimenting with Uncertainty (CUP: 2001) Handbook of Applied Linguistics (Blackwell, 2004).

Hayo Reinders (www.hayo.nl) is Editor of Innovation in Language Learning and Teaching. He was previously Director of the English Language Self-Access Centre and Visiting Professor at Meiji University in Tokyo. His research interests are in the areas of computer-assisted language learning and learner autonomy.

Rosemary Erlam is lecturer in the Department of Applied Language Studies and Linguistics at the University of Auckland. She comes to Applied Linguistics from backgrounds in Speech-Language Therapy and French teaching. Her research interests include teacher education, form-focused instruction and issues pertinent to the New Zealand educational context.

Jenefer Philp is a lecturer at the University of Auckland. Her experimental and classroom based research centers on the role of interaction in second language development by adults and children She has recently co-edited a book titled Second language acquisition and the younger learner: Child? s play?, published by John Benjamins.