NOUVELLE FORMULE : les séminaires sont de retour en présentiel au local PK-5115
Jeudi 2 février, à 10 h 30 (Le local est ouvert dès 10 h 00).
Lien zoom pour participer à distance : https://uqam.zoom.us/j/89902403751
Par : Bob McMurray
Résumé :
Categorical perception is the finding from speech perception with the largest impact on cognitive science. However, within speech perception, it is known to be an artifact of task demands. Categorical perception is empirically defined as a relationship between phoneme identification and discrimination. As discrimination tasks do not appear to require categorization, this was thought to imply that listeners perceive speech solely in terms of categories. However, 50 years of work using discrimination tasks, priming, the Visual World Paradigm, and Event Related Potentials has rejected the strongest forms of CP and provide little strong evidence for any form of it. This talk reviews the origins and impact of this scientific meme and the work challenging it. Critically, CP stands in the way of a modern theoretical synthesis in speech perception in which listeners preserve fine-grained detail to enable more flexible processing. The demise of CP leads to a new understanding of how to use and interpret the most basic experimental paradigms–identification along a continuum – and has implications for language and hearing disorders, development, and multilingualism. Critically, the rise and fall of CP in speech perception – and the theoretical and empirical reasons for it – have large implications for the variety of other fields in which CP has been invoked.
Bio :
Bob McMurray, F. Wendell Miller Professor of Psychological and Brain Sciences at the University of Iowa, has done fundamental work on speech perception, word recognition in reading, how these fundamental language skills develop, and how they vary in a variety of language and communicative impairments. His work leverages psycholinguistic techniques like eye-tracking in the visual world paradigm, computational modeling, and electro-physiolology with machine learning. He is currently director of the longitudinal Growing Words Project which examines the development of language and reading skills in school age children, and associate director for the Iowa Cochlear Implant Clinical Research Center.
Références
McMurray, B. (2022) The Myth of Categorical Perception. Journal of the Acoustical Society of America. 152(6), 3819-3842. https://psyarxiv.com/dq7ej/
McMurray, B. (in press) The acquisition of speech categories: Beyond perceptual narrowing, beyond unsupervised learning and beyond infancy. Language, Cognition and Neuroscience. https://psyarxiv.com/njm3r/
McMurray, B., Apfelbaum, K., and Tomblin, J.B. (2022) The slow development of real-time processing: Spoken Word Recognition as a crucible for new about thinking about language acquisition and disorders. Current Directions in Psychological Science. 31(4), 305-315. https://psyarxiv.com/uebfc/
Kapnoula, E., & McMurray, B. (2021) On the locus of individual differences in perceptual flexibility: ERP evidence for perceptual warping of speech sounds. Brain & Language, 223 (2021): 105031 https://psyarxiv.com/q9stn
McMurray, B., Danelz, A., Rigler, H., and Seedorff, M. (2018) Speech categorization develops slowly through adolescence. Developmental Psychology, 54(8), 1472-1491.