David Lasagabaster is Full Professor of Applied Linguistics at the University of the Basque Country UPV/EHU, Spain. He publishes widely on topics within EMI, CLIL, second language acquisition and multilingualism. He serves on the editorial board of seven journals, including the International Journal of Bilingual Education and Bilingualism.

Alberto Fernández-Costales is Associate Professor at the University of Oviedo, Spain. His research interests include EMI, language attitudes, motivation, language teaching methodology and audiovisual translation. He is Associate Editor of the Porta Linguarum and Perspectives journals.

Flor de Lis González-Mujico is a Postdoctoral Researcher at the University of the Basque Country UPV/EHU, Spain. Her research explores self-concept and motivation, EMI, multilingualism, digital competence and language teaching methodology.

This book offers a timely investigation into the impact of affective factors on learning in English-medium instruction. It explores topics including motivation, anxiety, emotions, willingness to communicate and teacher beliefs, providing insights into the field from Anglophone, non-Anglophone, monolingual, multilingual and migration contexts.