Dani Byrd is Professor of Linguistics at the University of Southern California and a Research Affiliate of Haskins Laboratories. She is a member of the Editorial Board on both the Journal of Phonetics and the Journal of the International Phonetic Association, and has published widely on articulation, vocal tract imaging and prosody. Toben H. Mintz is Associate Professor of Psychology and Linguistics at the University of Southern California, where his research involves studies with infants, toddlers, and adults, as well as computer modelling. He is on the Editorial Board of Cognition.