As globalization has increased awareness of the extent of language contact and linguistic diversity, questions concerning bilingualism and multilingualism have taken on an increasing importance from both practical and scholarly points of view. While there is a vast amount of information pertaining to research on bilingual and multilingual individuals and communities there is little information that deals with its methodology from different disciplinary perspectives in a systematic and coherent way. Written by leading experts in the field, The Blackwell Guide to Research Methods in Bilingualism and Multilingualism specifically addresses methodological issues, discussing research topics, key concepts and approaches, and the methods and tools for collecting and analyzing data. This useful and timely resource is the first of its kind to link theory to method and data.