2023 Fiscal Year Final Research Report
Investigation of the differences between phonetic and phonemic perception using mismatch negativity (MMN) responses
| Project/Area Number |
19K13169
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 02060:Linguistics-related
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 音声知覚 / 音素 / ミスマッチ陰性電位 / 弁別 |
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| Outline of Final Research Achievements |
This study examined the neural discrimination to a nasal consonant in the single vs. varying standard oddball paradigms, with the aim of isolating phonological from acoustic-phonetic neural discrimination. The result demonstrated that a larger mismatch negativity (MMN) was elicited in the single-standard oddball paradigm, compared to the varying-standard oddball paradigm. However, a late discriminative negativity (LDN) was elicited in the varying-standard oddball paradigm, which was designed to elicit a phonological response. These results suggest that listeners rely on phonological representations in the varying-standard oddball paradigm, and it takes longer time to compute the phonological category.
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| Free Research Field |
音声学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果は、ヒトが言語音を知覚するその過程において、脳がどのような処理を行っているのか、その手がかりを示したことにある。先行研究において、ミスマッチ陰性電位を誘発させる刺激音の提示方法として主に２種類のパラダイムが存在するが、本研究ではそれぞれのパラダイム下で脳がどのような反応を示すか調査した。これまで比較検証がされていなかった各パラダイム下における脳反応が明確化されたことで、今後の研究手法の発展に貢献する。
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