John W. Schwieter is Professor of Spanish and Linguistics, cross-appointed in psychology, and Director of Bilingualism Matters @ Laurier and the Language Acquisition, Multilingualism, and Cognition Laboratory at Wilfrid Laurier University, Canada. He is also an Adjunct Professor of Linguistics at McMaster University, Canada, and is Executive Editor of Bilingual Processing and Acquisition (2016), Editor-in-Chief of Ampersand, and Co-Editor of Cambridge Elements in Second Language Acquisition (2019).
Julia Festman is Professor of Multilingualism at the University College of Teacher Education Tyrol, Austria. Her main research focus is on multilingualism on the individual, cognitive and educational level. She combines psycholinguistic, and neuroscientific methods for investigating learning and processing of multiple languages. Her latest book, Second Language Acquisition and Lifelong Learning (2023), is coauthored with S. Pfenninger and D. Singleton.