ZHU HUA is Senior Lecturer in Applied Linguistics at Birkbeck, University of London, UK. She is the author of Phonological Development in Specific Contexts, joint author of , and co-editor, with Barbara Dodd, of Phonological Development Disorders in Children: A Multilingual Perspective. PAUL SEEDHOUSE is Reader in Applied Linguistics at the University of Newcastle Upon Tyne, UK. His book The Interactional Architecture of the Language Classroom won the 2005 Kenneth Mildenberger Prize of the MLA. He has also co-edited, with Keith Richards, Applying Conversationa