Mirosław Pawlak is Professor of English at Adam Mickiewicz University, Poznań, Poland, and at the University of Applied Sciences, Konin, Poland. His main areas of interest are form-focused instruction, corrective feedback, pronunciation teaching, learning strategies, motivation, willingness to communicate, grit, emotions, and study abroad. He is the editor of the Springer book series Second Language Learning and Teaching.Mariusz Kruk is Associate Professor at the University of Zielona Góra, Poland, and at Adam Mickiewicz University, Poznań, Poland. His main areas of interest include individual difference variables and the application of technology in foreign language learning and teaching. His publications have appeared in various accredited journals.