A. Lynn Williams, Ph.D. is Associate Dean in the College of Clinical and Rehabilitative Health Sciences and a professor in the Department of Audiology and Speech-Language Pathology at East Tennessee State University. Most of her research has involved clinical investigations of models of phonological treatment for children with severe to profound speech sound disorders. She developed a new model of phonological intervention called multiple oppositions that has been the basis of federally funded intervention studies by the National Institutes of Health (NIH), and she developed a phonological intervention software program, Sound Contrasts in Phonology (SCIP), that was funded by NIH. Dr. Williams served as associate editor of Language, Speech, and Hearing Services in Schools and most recently served as the associate editor of the American Journal of Speech-Language Pathology. Dr. Williams is a Fellow of the American Speech-Language-Hearing Association and served as ASHA Vice President for Academic Affairs in Speech-Language Pathology (2016–2018). She currently serves as ASHA’s 2020 President-Elect (2021 ASHA President). Dr. Carol Stoel-Gammon is Professor Emerita in the Department of Speech and Hearing Sciences at the University of Washington, Seattle. She received her doctoral degree in Linguistics from Stanford University, and has taught, mentored and carried out research in the area of phonological development and disorders for many years. Her book Normal and Disordered Phonology in Children, co-authored with Carla Dunn was published in 1985. Her research interests focus on prelinguistic vocal development and early phonological development in children who are typically developing, and speech development of children with autism, cleft palate, Down syndrome, Fragile X, childhood apraxia of speech, children who are deaf or hard-of-hearing, and late talkers. Dr. Stoel-Gammon as served as Associate Editor of the Journal of Speech and Hearing Disorders, the Journal of Speech and Hearing Research, the American Journal of Speech-Language Pathology, and the Journal of Child Language.

A. Lynn Williams, Ph.D. is Associate Dean in the College of Clinical and Rehabilitative Health Sciences and a professor in the Department of Audiology and Speech-Language Pathology at East Tennessee State University. Most of her research has involved clinical investigations of models of phonological treatment for children with severe to profound speech sound disorders. She developed a new model of phonological intervention called multiple oppositions that has been the basis of federally funded intervention studies by the National Institutes of Health (NIH), and she developed a phonological intervention software program, Sound Contrasts in Phonology (SCIP), that was funded by NIH. Dr. Williams served as associate editor of Language, Speech, and Hearing Services in Schools and most recently served as the associate editor of the American Journal of Speech-Language Pathology. Dr. Williams is a Fellow of the American Speech-Language-Hearing Association and served as ASHA Vice President for Academic Affairs in Speech-Language Pathology (2016–2018). She currently serves as ASHA’s 2020 President-Elect (2021 ASHA President). Dr. Carol Stoel-Gammon is Professor Emerita in the Department of Speech and Hearing Sciences at the University of Washington, Seattle. She received her doctoral degree in Linguistics from Stanford University, and has taught, mentored and carried out research in the area of phonological development and disorders for many years. Her book Normal and Disordered Phonology in Children, co-authored with Carla Dunn was published in 1985. Her research interests focus on prelinguistic vocal development and early phonological development in children who are typically developing, and speech development of children with autism, cleft palate, Down syndrome, Fragile X, childhood apraxia of speech, children who are deaf or hard-of-hearing, and late talkers. Dr. Stoel-Gammon as served as Associate Editor of the Journal of Speech and Hearing Disorders, the Journal of Speech and Hearing Research, the American Journal of Speech-Language Pathology, and the Journal of Child Language.

A. Lynn Williams, Ph.D. is Associate Dean in the College of Clinical and Rehabilitative Health Sciences and a professor in the Department of Audiology and Speech-Language Pathology at East Tennessee State University. Most of her research has involved clinical investigations of models of phonological treatment for children with severe to profound speech sound disorders. She developed a new model of phonological intervention called multiple oppositions that has been the basis of federally funded intervention studies by the National Institutes of Health (NIH), and she developed a phonological intervention software program, Sound Contrasts in Phonology (SCIP), that was funded by NIH. Dr. Williams served as associate editor of Language, Speech, and Hearing Services in Schools and most recently served as the associate editor of the American Journal of Speech-Language Pathology. Dr. Williams is a Fellow of the American Speech-Language-Hearing Association and served as ASHA Vice President for Academic Affairs in Speech-Language Pathology (2016–2018). She currently serves as ASHA’s 2020 President-Elect (2021 ASHA President). Dr. Carol Stoel-Gammon is Professor Emerita in the Department of Speech and Hearing Sciences at the University of Washington, Seattle. She received her doctoral degree in Linguistics from Stanford University, and has taught, mentored and carried out research in the area of phonological development and disorders for many years. Her book Normal and Disordered Phonology in Children, co-authored with Carla Dunn was published in 1985. Her research interests focus on prelinguistic vocal development and early phonological development in children who are typically developing, and speech development of children with autism, cleft palate, Down syndrome, Fragile X, childhood apraxia of speech, children who are deaf or hard-of-hearing, and late talkers. Dr. Stoel-Gammon as served as Associate Editor of the Journal of Speech and Hearing Disorders, the Journal of Speech and Hearing Research, the American Journal of Speech-Language Pathology, and the Journal of Child Language.