An phonological analysis of fluency disorders and its application.

2022 Fiscal Year Final Research Report

• Project/Area Number: 17K02696
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Linguistics
• Research Institution: Hyogo University (2022); Osaka Shin-Ai College (2021); Niigata University of Rehabilitation (2017-2020)
• Principal Investigator: Uihira Akira 兵庫大学, 付置研究所, 研究員 (10334012)
• Project Period (FY): 2017-04-01 – 2023-03-31
• Keywords: 発話の非流暢性 / 複合語アクセント / 遅あがり / 声調変化 / 日本語の吃音 / 中国語の吃音

Outline of Final Research Achievements

My previous studies on multilingual aspects of fluency disorders showed three triggers which produce stuttering. This study trys to find another trigger. There are irregular pitch change systems in Japanese and Chinese. In Japanese Nagoya dialect the accent of a single word is distinct from that of the compound word which involves the single word. When a stutterer plans the compound word, he/she tries to make the single word accent first. Perceiving its error on the way, he/she reforms the compound accent. As a sequel he/she repeats the first mora of the word. The stutterer is at a loss for the unique rule of late pitch rising in the dialect. Stuttering is due to dialects in Japanese. In Chinese. when a stutterer meets a tone sandhi, he/she realizes the tone of the normal systems first. Detecting the wrong tone on the way, he/she rebuild the tone sandhi. As a result he/she repeats the first syllable of the word. Japanese and Chinese have the same processes for producing disfluency.

Free Research Field

音声学、音韻論、言語障害学

Academic Significance and Societal Importance of the Research Achievements

先行研究の成果から手順が複雑な音声の移行が強力な非流暢性の引き金と言える。ピッチ変化と非流暢性生起の関係では、日本語の単語と複合語のアクセント型の切り替えが頭の中でできずに、また中国語の声調変化の切り替えが頭の中でできずに、非流暢性を生起している。この二つは音韻処理過程の操作であり、吃音は音韻処理過程の弱点と言う主張の傍証になる。また日本語の複合語アクセントで名古屋方言独特の遅あがりの有無で、非流暢性生成の有無が決まる。即ち方言で吃音が異なることを初めて実証的に示唆している。そして日本語吃音のセラピーにおいては、方言とアクセントを考慮した取り組みがなされていくことを期待する。