A role for the developing lexicon in phonetic category acquisition

Naomi H. Feldman, Thomas L. Griffiths, Sharon Goldwater, James L. Morgan

Research output: Contribution to journalArticlepeer-review

Abstract

Infants learn to segment words from fluent speech during the same period as they learn native language phonetic categories, yet accounts of phonetic category acquisition typically ignore information about the words in which sounds appear. We use a Bayesian model to illustrate how feedback from segmented words might constrain phonetic category learning by providing information about which sounds occur together in words. Simulations demonstrate that word-level information can successfully disambiguate overlapping English vowel categories. Learning patterns in the model are shown to parallel human behavior from artificial language learning tasks. These findings point to a central role for the developing lexicon in phonetic category acquisition and provide a framework for incorporating top-down constraints into models of category learning.
Original languageEnglish
Pages (from-to)751-778
Number of pages28
JournalPsychological Review
Volume120
Issue number4
Publication statusPublished - 2013

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