Rate My Professor Katherine Demuth

Distinguished Professor Katherine Demuth is an Emeritus Professor in the Department of Linguistics at Macquarie University, where she founded the Child Language Lab and serves as Director of the Centre for Language Sciences (CLaS). Her research focuses on language acquisition, encompassing both perception and production studies. Demuth investigates the development of phonological, morphological, and syntactic representations in typically developing children, language-impaired children, and second language learners. Employing a cross-linguistic approach, she draws on the structures of diverse languages, including Bantu languages like Sesotho and Mandarin, to illuminate the mechanisms underlying language acquisition processes. She has contributed to the development of the Demuth Sesotho Corpus, one of the audio corpora available on the CHILDES database.

Demuth received the ARC Laureate Fellowship in 2013 for her work on child language acquisition, one of only 17 such awards for science in Australia. In 2015, she was elected a Fellow of the Academy of the Social Sciences in Australia in recognition of her distinguished international contributions to the social sciences. As Chief Investigator, she has led multiple ARC-funded projects, including those on early childhood language programs in the Northern Territory, auditory speech discrimination in infants with hearing loss, and children's acquisition of grammatical morphology (2014–2023). Her influential publications include 'Listening to different talkers and its effect on word identification for children using hearing devices' (2026, Applied Psycholinguistics), 'Mandarin-speaking preschoolers with cochlear implants can use duration and pitch to mark prosodic boundaries' (2026, Ear and Hearing), 'Maternal input, not transient elevated depression and anxiety symptoms, predicts 2-year-olds' vocabulary development' (2026, Journal of Child Language), 'Issues in the acquisition of the Sesotho tonal system' (1993, Journal of Child Language), and 'Prosody outranks syntax: an optimality approach to subject inversion in Bantu relatives' (1999). Demuth's research informs language development in bilinguals, children with hearing loss, and those with specific language impairment or delay, advancing the field of linguistics through her directorial roles and editorial contributions.