Saskia Kersten is Professor of Applied Linguistics and Media Didactics at the Ludwig-Maximilians-Universität München, Germany. Her research interests are formulaic language, digitally-mediated interaction, including its use in the EFL classroom, and corpus linguistic methods in interdisciplinary research. 

Christian Ludwig is currently visiting Professor at the Freie Universität Berlin, Germany. His research interests include literature and digital tools in language teaching as well as applying positive psychology in school settings.