Paula M. Rhyner, PhD, CCC-SLP, is Professor in the Department of Communication Sciences and Disorders at the University of Wisconsin-Milwaukee (UWM). She is a Board Recognized Specialist in Child Language and has served in various roles on the Specialty Board on Child Language, including that of Chair. Dr. Rhyner is a member of the editorial board for Communication Disorders Quarterly, and served as an Associate Editor for Language, Speech, and Hearing Services in Schools. She directs the Child Language Lab at UWM, which conducts interdisciplinary research in areas related to development and disabilities in children from birth through 5 years of age. Her published research on language assessment and intervention and her interest in emergent literacy and early language acquisition led her to collaborate with the series editors and the other contributing authors to create this book.