Antony John Kunnan is Professor of English Language and Literature at the National Institute of Education, Nanyang Technological University, Singapore. He has authored and edited books and edited special issues of journals on test validation, test fairness, statistics for language assessment, differential item functioning, and structural equation modeling. His most recent book is Workbook for Statistics in Language Assessment (coauthored with Lyle Bachman, 2005). He was the founding editor of Language Assessment Quarterly, which he edited from 2003 to 2013, and is past president of the International Language Testing Association.