Second Language Speech Intelligibility Revisited: Differential Roles of Phonological Accuracy, Visual Speech, and Iconic Gesture,The Modern Language Journal

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Second Language Speech Intelligibility Revisited: Differential Roles of Phonological Accuracy, Visual Speech, and Iconic Gesture
The Modern Language Journal ( IF 4.7 ) Pub Date : 2022-06-08 , DOI: 10.1111/modl.12779
PAGE WHEELER ₁ , KAZUYA SAITO ₁

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Although intelligibility is a core concept in second language (L2) speech assessment and teaching research, the vast majority of previous work relies on audio-only stimuli. The current study set out to examine how linguistic and visual information jointly interact to determine the degree of speech intelligibility. Both first language (L1) and L2 English listeners were presented with stimuli that varied along 3 factors (vowel error, visual speech, and iconic gesture) and completed an orthographic transcription task. Results revealed that iconic gesture significantly increased all the listeners’ intelligibility scores when speech contained vowel errors. When speech did not contain errors, gesture increased intelligibility for L2 listeners but not L1 listeners. Visual speech had no significant effect on intelligibility in either listener group. Vowel error reduced intelligibility by approximately 20–30% for both L1 and L2 listeners. Findings suggest that visual modalities, especially gestures, have the potential to significantly affect the intelligibility of speech containing phonological errors.

中文翻译：

重新审视第二语言语音清晰度：语音准确性、视觉语音和标志性手势的不同作用

尽管可理解性是第二语言 (L2) 语音评估和教学研究的核心概念，但之前的绝大多数工作都依赖于纯音频刺激。目前的研究着手研究语言和视觉信息如何共同相互作用以确定语音可懂度的程度。第一语言 (L1) 和 L2 英语听众都接受了随 3 个因素（元音错误、视觉语音和标志性手势）变化的刺激，并完成了正字法转录任务。结果表明，当语音包含元音错误时，标志性手势显着提高了所有听众的可理解性分数。当语音不包含错误时，手势增加了 L2 听众的可理解性，而不是 L1 听众。视觉语音对两个听众组的可理解性没有显着影响。元音错误使 L1 和 L2 听众的可懂度降低了大约 20-30%。研究结果表明，视觉形式，尤其是手势，有可能显着影响包含语音错误的语音的可理解性。

更新日期：2022-06-08

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