Dr. John Bernthal is Professor Emeritus of Special Education and Communication Disorders at the University of Nebraska--Lincoln. He has been a speech-language pathologist for over 40 years including employment in the public school, at several universities, and professor and Department Chair for over 30 years. He conducted research, taught and published in the area of speech sounds disorders. He is a past president of the American Speech Language Hearing Association, an ASHA fellow, and recipient of Honors of the Association. Dr. Nicholas Bankson is a Professor Emeritus of Communication Sciences and Disorders at James Madison University. He has had a 40-year career as a speech-language pathologist, including employment in the public schools, serving as the state supervisor of school programs in Kansas, plus 27 years as a department chair in Communication Sciences and Disorders at Boston University and James Madison University. His scholarly efforts have focused on speech sound disorders and assessment of language disorders in children. He is an ASHA Fellow, and is the recipient of the Honors of ASHA. Dr. Peter Flipsen Jr. is a Professor of Speech-Language Pathology at Pacific University. He has more than 20 years of experience in the field as a clinician, teacher, and researcher. He teaches courses in phonetics and speech sound disorders in children and has published more than 25 peer-reviewed journal articles in the field. His research has focused on classification of speech sound disorders, measurement of intelligibility of speech, and speech and language development in children with cochlear implants.