This series highlights key topics in applied linguistics. Each book presents original research, either updating and re-thinking a traditional theme, or introducing important new concepts. Topics reflect the broad range of current interests in applied linguistics and include aspects of language acquisition, language teaching, learning and testing, sociolinguistics, cognitive linguistics, discourse studies, and research methodologies. The volumes in the series are accessible to a wide audience and particularly relevant to students on graduate courses in applied linguistics and TESOL, as well as to researchers in these areas.