2019 Fiscal Year Final Research Report
Speech Sound Production in the Bilingual Brain
| Project/Area Number |
17K02748
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Linguistics
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| Research Institution | Hiroshima University |
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Principal Investigator |
VERDONSCHOT RG 広島大学, 医系科学研究科(歯), 助教 (30756094)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | language production / psycholinguistics / neurolinguistics / phonology / EEG / speech production / electroencephalography |
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| Outline of Final Research Achievements |
This project had several noteworthy research outcomes. First, we found, using a picture-word naming task, that Japanese native speakers showed diverging brain potentials when a mora unit was overlapping. When a phoneme was overlapping between picture and distractor word no significant brain pattern differences were found. In another paper, we found that when a bilingual's L2 English ability increases the physical manifestation of the mora in the L2-English speech signal disappeared (i.e. relative to low-proficient bilinguals who added vowels to English words to adhere to their L1 Japanese moraic structure). Next, For Korean phonological encoding we found an ambiguous role for the phoneme but a more pronounced role for the syllable. Lastly, the use of the Stroop color naming task was validated as a suitable tool to investigate the phonological unit of language production.
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| Free Research Field |
言語学
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| Academic Significance and Societal Importance of the Research Achievements |
The current findings inform theoretical models on the architecture of the language production system (e.g. Levelt et al. 1999). Additionally, there are numerous societal and practical implications of this project to language education, speech pathology and human-machine interaction.
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