Joe Barcroft (Ph.D. University of Illinois at Urbana-Champaign) is Associate Professor of Spanish and Second Language Acquisition in the Department of Romance Languages and Literatures at Washington University in St. Louis. He is Director of Basic Language Instruction in Spanish (Spanish 101-201); Director of Teaching Assistant Training; and Co-Director of the Graduate Certificate in Language Instruction. He is a participating faculty member of the Program in Linguistics and holds affiliate appointments in the Program in Philosophy, Neuroscience, and Psychology, and in the Minor in Applied Linguistics. He teaches courses on language teaching methodology, second language acquisition, grammar and vocabulary acquisition, and Hispanic linguistics. Professor Barcroft’s research interests include second language vocabulary acquisition; input processing; processing resource allocation during lexical acquisition; the role of acoustic variability in language learning and speech processing; the bilingual mental lexicon; and psycholinguistic approaches to other issues in second language acquisition and bilingualism. His articles appear in journals such as Studies in Second Language Acquisition, Language Learning, Applied Psycholinguistics, Second Language Research, and The Modern Language Journal. His input-based incremental approach to second language vocabulary instruction, which is grounded in research findings on lexical input processing, is described in articles in Foreign Language Annals and Hispania. His current research projects focus on second language partial word form learning; effects of acoustic variability on vocabulary learning and auditory training; and the relationship between second language vocabulary learning and bilingual lexicosemantic representation.