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The Relationship between Phonemic Ca...

Zheng, Yi.

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The Relationship between Phonemic Category Boundary Changes and Perceptual Adjustments to Natural Accents.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Relationship between Phonemic Category Boundary Changes and Perceptual Adjustments to Natural Accents./
作者:	Zheng, Yi.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	109 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-05, Section: B.
Contained By:	Dissertations Abstracts International80-05B.
標題:	Linguistics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10846101
ISBN:	9780438575325

The Relationship between Phonemic Category Boundary Changes and Perceptual Adjustments to Natural Accents.
Zheng, Yi.

The Relationship between Phonemic Category Boundary Changes and Perceptual Adjustments to Natural Accents. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 109 p.

Source: Dissertations Abstracts International, Volume: 80-05, Section: B.

Thesis (Ph.D.)--State University of New York at Stony Brook, 2018.

This item must not be sold to any third party vendors.

People often experience difficulties when they first hear a novel accent, either regional or foreign. However, the human perceptual system can actively adjust to new accents, leading to improved performance in accented speech perception and comprehension. Prior research has shown that relatively fast natural accent accommodation can occur. However, there has been little investigation of the underlying perceptual mechanism that drives the learning. Literature on perceptual recalibration of phonemic categories shows that listeners retune their phonemic categories when they are exposed to a number of idiosyncratic pronunciations of speech sounds (e.g., consistently hearing /s/ as an ambiguous mixture of /s/ and /f/). These studies investigated adjustments to variation with a more specific focus, without directly connecting the results to accent-based variation. The recalibration studies share some features with another phenomenon - selective adaptation. Like recalibration, adaptation produces shifts in listeners' phoneme boundaries. Unlike recalibration, adaptation is driven by hearing unambiguous speech sounds many times, and the effect is to reduce the report of similar-sounding phonemes. Despite these differences, a widely-cited recent model (Kleinschmidt & Jaeger, 2015) treats the two effects as having a common underlying mechanism. The current study aims to bring these literatures together and examines whether the exposure-driven phonemic boundary changes play a central role in natural accent accommodation. Both recalibration and selective adaptation were used to reflect the flexibility of phonemic category boundaries. Two different segment types (i.e., one consonant contrast and one vowel contrast) were tested, chosen to be characteristically difficult for Chinese native speakers. Two Chinese speakers with moderate accents recorded the stimuli for the natural accent accommodation task. The study includes four experiments, based on the crossing of two contrasts with two speakers. In each experiment, participants completed recalibration, selective adaptation, and natural accent accommodation tasks focusing on one contrast. The results indicated that: (1) There is no strong link between retuning phonemic boundaries (i.e., selective adaptation, recalibration) and natural accent accommodation; (2) Participants showed an increased endorsement of accented/mispronounced words after exposure to a speaker's accented speech, indicating a potential relaxation of criteria in the word recognition process; (3) A small but significant correlation between recalibration and selective adaptation was found for the vowel contrast, but not for the consonant contrast. In sum, the present study investigated the underlying mechanism of natural accent adjustment, and the results suggest that retuning of phonemic boundaries does not play a central role in natural accent accommodation. Instead, there is some evidence suggesting that natural accent accommodation involves a relaxation of phonemic categorization.

ISBN: 9780438575325Subjects--Topical Terms:

524476
Linguistics.
Subjects--Index Terms:

Accent

The Relationship between Phonemic Category Boundary Changes and Perceptual Adjustments to Natural Accents.
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500 $a Publisher info.: Dissertation/Thesis.
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520 $a People often experience difficulties when they first hear a novel accent, either regional or foreign. However, the human perceptual system can actively adjust to new accents, leading to improved performance in accented speech perception and comprehension. Prior research has shown that relatively fast natural accent accommodation can occur. However, there has been little investigation of the underlying perceptual mechanism that drives the learning. Literature on perceptual recalibration of phonemic categories shows that listeners retune their phonemic categories when they are exposed to a number of idiosyncratic pronunciations of speech sounds (e.g., consistently hearing /s/ as an ambiguous mixture of /s/ and /f/). These studies investigated adjustments to variation with a more specific focus, without directly connecting the results to accent-based variation. The recalibration studies share some features with another phenomenon - selective adaptation. Like recalibration, adaptation produces shifts in listeners' phoneme boundaries. Unlike recalibration, adaptation is driven by hearing unambiguous speech sounds many times, and the effect is to reduce the report of similar-sounding phonemes. Despite these differences, a widely-cited recent model (Kleinschmidt & Jaeger, 2015) treats the two effects as having a common underlying mechanism. The current study aims to bring these literatures together and examines whether the exposure-driven phonemic boundary changes play a central role in natural accent accommodation. Both recalibration and selective adaptation were used to reflect the flexibility of phonemic category boundaries. Two different segment types (i.e., one consonant contrast and one vowel contrast) were tested, chosen to be characteristically difficult for Chinese native speakers. Two Chinese speakers with moderate accents recorded the stimuli for the natural accent accommodation task. The study includes four experiments, based on the crossing of two contrasts with two speakers. In each experiment, participants completed recalibration, selective adaptation, and natural accent accommodation tasks focusing on one contrast. The results indicated that: (1) There is no strong link between retuning phonemic boundaries (i.e., selective adaptation, recalibration) and natural accent accommodation; (2) Participants showed an increased endorsement of accented/mispronounced words after exposure to a speaker's accented speech, indicating a potential relaxation of criteria in the word recognition process; (3) A small but significant correlation between recalibration and selective adaptation was found for the vowel contrast, but not for the consonant contrast. In sum, the present study investigated the underlying mechanism of natural accent adjustment, and the results suggest that retuning of phonemic boundaries does not play a central role in natural accent accommodation. Instead, there is some evidence suggesting that natural accent accommodation involves a relaxation of phonemic categorization.
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