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Jessica Barlow is Professor of Speech, Language, and Hearing Sciences at San Diego State University in California, USA. Her research focuses on phonological acquisition, phonological theory and phonological disorders, with an emphasis on English, Spanish and Spanish-English bilingualism. Most recently she has been focusing on morphophonology in acquisition. Her research has been published in such journals as Bilingualism: Language & Cognition; Clinical Linguistics & Phonetics; Frontiers in Psychology; Journal of Speech, Language, and Hearing Research; Language Acquisition; and Lingua. She is co-editor, with Ashley Farris-Trimble, of Perspectives on phonological theory and acquisition: In honor of Daniel A. Dinnsen (2014).

Judith A. Gierut is Professor of Speech and Hearing Sciences and Cognitive Science and Adjunct Professor of Linguistics at Indiana University, Bloomington. She is the Principal Investigator and Director of the Learnability Project, funded by the National Institutes of Health.