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2023 Fiscal Year Final Research Report

Perceptual training for distinguishing Korean stop consonants: an acoustic approach and neurophysiological evaluation

Research Project

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Project/Area Number 22K19996
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0102:Literature, linguistics, and related fields
Research InstitutionKyushu University

Principal Investigator

Sung Yubin  九州大学, 大学病院, 学術研究員 (30968326)

Project Period (FY) 2022-08-31 – 2024-03-31
Keywords韓国語 / 破裂子音 / 日本語母語話者 / 知覚訓練 / 脳波 / 韓国語母語話者 / 基本周波数 / 神経振動
Outline of Final Research Achievements

In this study, I examined whether perceptual training focused on voice pitch would enable native Japanese speakers to more effectively distinguish among Korean stop consonants (/t*/, /t/, /th/). In addition, I aimed to demonstrate the effect of pitch-focused training from a neurophysiological perspective by investigating whether neuronal activity related to pitch changes in a manner similar to that of native Korean speakers. The results revealed that both the group advised to focus on pitch and the group without such advice showed improved correct response rates comparable to those of native Korean speakers through training. Furthermore, EEG analysis using the phase-locking factor showed changes in phase synchronization of neuronal activity corresponding to transitions in voice pitch.

Free Research Field

知覚心理学

Academic Significance and Societal Importance of the Research Achievements

日本語母語話者は韓国語の破裂子音の聴き分けを習得することは困難であることが知られている。本研究の結果は, 音声刺激と訓練次第では日本語母語話者も聴こえてくる破裂子音の発音を三つのカテゴリーに分けて習得することができることを示唆する。また, 本研究では, 破裂子音を聴き分ける時の下降または上昇する後続母音の周波数の遷移の神経表現を観察することができた。この結果は, 脳波の時間周波数解析によって発音習得の程度が評価できる可能性を示唆しており, 外国語学習者や子どもの発音習得度の評価のための研究につなげられると考えられる。

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Published: 2025-01-30  

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