James Enos Purpura is Professor Emeritus of linguistics and education in the Applied Linguistics and TESOL Program and Director of the Scenario-Based Language Assessment Lab at Teachers College, Columbia University, USA. His scholarly interests include: the assessment of grammar, meaning, and pragmatics; cognition and language assessment; and both learning-oriented and scenario-based assessment. He was editor of Language Assessment Quarterly and past president of the International Language Testing Association.

Antony John Kunnan is a language assessment specialist with Carnegie Mellon University, USA, as a Senior Research Fellow. His research interests are fairness of tests and testing practice, assessment literacy, research methods and statistics, ethics and standards, and language assessment policy. He was founding editor of Language Assessment Quarterly, past president of the International Language Testing Association, and the founding president of the Asian Association for Language Assessment. He was awarded the Cambridge/ILTA Distinguished Achievement Award in language assessment in 2024.