This book examines the evidence relative to the idea that there is an age factor in first and second language acquisition, evidence that has sources ranging from studies of feral children to evaluations of language programmes in primary schools. Furthermore, it explores the various explanations that have been advanced to account for such evidence.
David Singleton is Fellow Emeritus, Trinity College Dublin, Ireland, Professor Emeritus, University of Pannonia, Hungary and Professor, University of Applied Sciences, Konin, Poland. He is the author of numerous monographs and textbooks, including Key Topics in Second Language Acquisition (2014, with Vivian Cook, Multilingual Matters) and Beyond Age Effects in Instructional L2 Learning (2017, with Simone Pfenninger, Multilingual Matters).
Lisa Ryan is completing a PhD in Child Language Acquisition at Trinity College Dublin. Her current post is that of Principal Speech and Language Therapist for Community Care in Area 7 of the Northern Area Health Board, Dublin. She is a member of the Royal College of Speech and Language Therapists and also sits on the Education Committee and the Publications Committee of the Irish Association of Speech and Language Therapists.