Wynne Wong is Professor of French and Second Language Acquisition at The Ohio State University, USA. She is the author of Input Enhancement: From Theory and Research to the Classroom (2005) and lead author of two French textbooks: Liaisons (2013, 2019) and Encore (2016, 2020). She is/has been on the editorial board of the journal Instructed Second Language Acquisition and on the advisory committee of The Canadian Modern Language Review.

Joe Barcroft is Professor of Spanish and Second Language Acquisition and Affiliate Professor of Psychological & Brain Sciences at Washington University in St. Louis, USA. His books include Lexical Input Processing and Vocabulary Learning (2015); Input-Based Incremental Vocabulary Acquisition (2012); and the volume, co-edited with Javier Muñoz-Basols, Spanish Vocabulary Learning in Meaning-Oriented Instruction (2021).