Susan M. Gass is University Distinguished Professor in the Department of Linguistics, Germanic, Slavic, Asian and African Languages at Michigan State University. She has conducted research in a wide variety of sub-areas of second language acquisition including language transfer, language universals, second language research methods, and input and interaction. She is the author/editor of numerous books including "Second Language Acquisition: An Introductory Course "(with Larry Selinker) and "Input, Interaction, and the Second Language Learner." She has published widely in the field of second la...