リスナーの単語末/l/の知覚:リスナー方言の影響
Hyunju Chung1, Sarah K Schellinger2
1Department of Communication Sciences and Disorders, Louisiana State University, 73 Hatcher Hall, Field House Drive, Baton Rouge, Louisiana, 70803, United States.
Journal of communication disorders
|December 20, 2025
まとめ
リスナー方言は/l/音の知覚に影響を与えるが、話者の年齢と母音文脈はより重要な要因である。この研究は、正確な臨床音声評価に不可欠である。
科学分野:
- 言語学
- 音声学
- 社会言語学
背景:
- 音声の知覚は、地域方言によって異なる場合がある。
- 単語末の/l/の音声は、南部白人英語(SWE)やアッパー中西部英語(UME)などの英語方言によって異なる。
- 以前の研究では、SWE話者によって生成された/l/のSWEリスナーによる知覚が調査された。
研究 の 目的:
- アッパー中西部英語(UME)話者リスナーが、南部白人英語(SWE)話者によって生成された単語末/l/をどのように知覚するかを調査する。
- UMEリスナーの知覚をSWEリスナーの知覚と比較する。
- リスナー方言が/l/音声の知覚に及ぼす影響を決定する。
主な方法:
- 32人の一言語UME話者が、成人および小児SWE話者によって生成された単語末/l/の/l/らしさを評価した。
- 知覚的判断は、多肢選択タスクと視覚アナログスケールを使用して収集された。
- UMEおよびSWE方言グループ間でリスナーの評価が比較された。
主要な成果:
- UMEおよびSWEリスナーは、成人SWE話者によって生成された/l/を、小児SWE話者によって生成された/l/よりも正確であると知覚した。
- 母音文脈は、両方のリスナーグループの判断に有意に影響を与え、低後方母音に続く/l/は、より正確ではないと知覚された。
- UMEおよびSWEリスナー間では、特に母音文脈の影響に関して、知覚的評価に微妙な違いが観察された。
結論:
- 話者の年齢と母音文脈は、リスナー方言よりも/l/の知覚に影響を与える。
- 音声誤りの正確な臨床的同定には、高前方母音と低後方母音の両方を含む母音文脈を考慮する必要がある。
- 音声知覚は方言的背景によって調節されるが、話者の年齢や音韻環境などの普遍的要因がより大きな役割を果たす。
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