Talker-specific influences on phonetic category structure

The Journal of the Acoustical Society of America
Rachel M TheodoreJanice A Lomibao

Abstract

A primary goal for models of speech perception is to describe how listeners achieve reliable comprehension given a lack of invariance between the acoustic signal and individual speech sounds. For example, individual talkers differ in how they implement phonetic properties of speech. Research suggests that listeners attain perceptual constancy by processing acoustic variation categorically while maintaining graded internal category structure. Moreover, listeners will use lexical information to modify category boundaries to learn to interpret a talker's ambiguous productions. The current work examines perceptual learning for talker differences that signal well-defined, unambiguous category members. Speech synthesis techniques were used to differentially manipulate talkers' characteristic productions of the stop voicing contrast for two groups of listeners. Following exposure to the talkers, internal category structure and category boundary were examined. The results showed that listeners dynamically adjusted internal category structure to be centered on experience with the talker's voice, but the category boundary remained fixed. These patterns were observed for words presented during training as well as novel lexical items. Thes...Continue Reading

References

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Citations

Feb 2, 2016·The Journal of the Acoustical Society of America·Minal A KadamLinda Polka
Oct 31, 2016·The Journal of the Acoustical Society of America·Julia R DrouinEmily B Myers
Jan 8, 2020·Attention, Perception & Psychophysics·Kaori Idemaru, Lori L Holt
Jan 4, 2019·Psychonomic Bulletin & Review·Rachel M Theodore, Nicholas R Monto
Jul 1, 2019·The Journal of the Acoustical Society of America·Divya Ganugapati, Rachel M Theodore
Sep 6, 2018·The Journal of the Acoustical Society of America·Julia R Drouin, Rachel M Theodore
May 10, 2019·The Journal of the Acoustical Society of America·Ashley A AssgariChristian E Stilp
Sep 1, 2018·Frontiers in Communication·Jean A CampbellRachel M Theodore
May 22, 2019·Phonetica·Molly BabelCharlotte Vaughn

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