Elena Babatsouli is Director of the Institute of Monolingual and Bilingual Speech in Chania, Greece. Her research focuses on phonology/phonetics and morphology, and her research interests include typical and atypical language acquisition (first, second, bilingual) and language use (dialects and speech errors).

David Ingram is Professor in the Department of Speech and Hearing Sciences, Arizona State University, USA. His research interests include language acquisition in typically developing children and children with language disorders, with a crosslinguistic focus.

Nicole Müller is Professor and Head of the Department of Speech and Hearing Sciences, University College Cork, Ireland. Her research interests include multilingualism and neurogenic and neurodegenerative conditions leading to cognitive-communicative impairments. She is co-editor (with Martin J. Ball) of the book series Communication Disorders Across Languages.