Carmen Pérez Vidal received her MA in Applied Linguistics from the University of Reading, UK, and her PhD in English linguistics from the University of Barcelona (Spain). She is Associate Professor in English Linguistics and Language Acquisition at Pompeu Fabra University (Barcelona, Spain), where she is Vicerector of Languages and coordinator of the ALLENCAM and SALA projects. Her research interests and recent publications deal with bilingual, second and foreign language acquisition in different contexts of learning: natural, formal, immersion and stay abroad. She has specialised in writing and the age factor, content and language integrated learning and input effects.

Maria Juan-Garau is Associate Professor in English and Vicedean of the Faculty of Philosophy and Arts at the Universitat de les Illes Balears (Spain), where she currently teaches courses in Applied Linguistics and Language Acquisition research methods. She has also taught EFL at secondary and tertiary level and has been involved in language teacher education. Her research interests and publications include bilingual first language acquisition, with a focus on the pragmatic aspects of mixing, the linguistic analysis of specialized language corpora, and the influence of learning context in foreign language acquisition, with special attention to the effects of study abroad.

Aurora Bel is Associate Professor at the Universitat Pompeu Fabra (Barcelona, Spain). She currently teaches Language Acquisition and Psycholinguistics. Her interests comprise the acquisition of Spanish and Catalan as first and second languages in multilingual environments, particularly the acquisition of morphosyntax and semantics. Her latest publications include the acquisition of agreement and the study of the knowledge and factors that explain the use of grammatical subjects by different populations of learners (L1, L2). Recently she is also focusing on the abnormal development of language and the language of translators.