James E. Purpura is Associate Professor of Linguistics and Education in the TESOL and Applied Linguistics Program at Teachers College, Columbia University. He teaches courses in language assessment and research design. His books include Learner strategy use and performance on L2 tests: A SEM approach (CUP, 1999), Assessing grammar (CUP, 2004), and he is currently co-authoring a book on Learning-Oriented Language Assessment (Routledge). He has articles in several top journals in Applied Linguistics and edited volumes. He is currently the Editor-in-Chief of Language Assessment Quarterly and is series co-editor of both New Perspectives in Language Assessment (Routledge) and Innovations in Language Learning and Assessment at ETS (Routledge). Jim has served on the Committee of Examiners (ETS) and on the U.S. Defense Language Testing Advisory Panel. He is an expert member of the European Association of Language Testing and Assessment. He was President of the International Language Testing Association from 2007 to 2008. He is a visiting faculty member and teaches in the Ph.D. in Applied Lingustics program.