Delayed Auditory Feedback Elicits Specific Patterns of Serial Order Errors in a Paced Syllable Sequence Production Task
Delayed Auditory Feedback Elicits Specific Patterns of Serial Order Errors in a Paced Syllable Sequence Production Task
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DOI：
10.1044/2022_jslhr-21-00427
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发表时间：
2022-05-01
影响因子：
2.6
通讯作者：
Bohland，Jason W.
中科院分区：
文献类型：
--
作者：
Malloy，Jessica R.;Nistal，Dominic;Bohland，Jason W.
目的延迟听觉反馈（delayed auditory feedback，ERF）干扰语音输出。不连贯会导致失真和不流利的发音，以及发音顺序的错误。虽然已经广泛地研究了言语错误，但由于相对较小的言语样本、研究之间的差异和不受控制的变量，导致言语错误的具体模式有些模糊。本研究的目的是在一个系统的音节序列产生任务中，使用一组封闭的声音，并控制语速，来描述连续顺序错误的类型，（C =辅音，V =元音）序列，节奏为“视觉节拍器，当听到延迟为0-250 ms的自我生成反馈时，听众转录录音，并且基于围绕自然发生的口误的文献对言语错误进行分类。一系列的混合效应模型被用来评估延迟的影响，不同的错误类型，错误到达的时间，和speakerate. ResultsReversal有一个显着的影响，延迟100毫秒或更大的整体错误率。统计模型显示显着的影响（相对于零延迟）元音和音节的重复，元音交换，元音省略，开始不流利，和扭曲。序列顺序错误尤其以元音和音节重复为主。平均而言，在反馈延迟较长的试验中，错误发生得较早。虽然较长的延迟造成较慢的语音，这种效果是介导的运行数（在实验中的时间）和小相比，在以前的研究。元音和音节重复错误的主导模式表明，可能的机制，即重复驱动器的变化，在言语规划表示的活动，产生错误。参考语音规划和产生的GODIVA（梯度顺序方向进入发音器速度）模型概述了这些机制。补充材料https：doi.org/10.23641/asha.19601785
PurposeDelayed auditory feedback (DAF) interferes with speech output. DAF causes distorted and disfluent productions and errors in the serial order of produced sounds. Although DAF has been studied extensively, the specific patterns of elicited speech errors are somewhat obscured by relatively small speech samples, differences across studies, and uncontrolled variables. The goal of this study was to characterize the types of serial order errors that increase under DAF in a systematic syllable sequence production task, which used a closed set of sounds and controlled for speech rate.MethodSixteen adult speakers repeatedly produced CVCVCV (C = consonant, V = vowel) sequences, paced to a “visual metronome,” while hearing self-generated feedback with delays of 0–250 ms. Listeners transcribed recordings, and speech errors were classified based on the literature surrounding naturally occurring slips of the tongue. A series of mixed-effects models were used to assess the effects of delay for different error types, for error arrival time, and for speaking rate.ResultsDAF had a significant effect on the overall error rate for delays of 100 ms or greater. Statistical models revealed significant effects (relative to zero delay) for vowel and syllable repetitions, vowel exchanges, vowel omissions, onset disfluencies, and distortions. Serial order errors were especially dominated by vowel and syllable repetitions. Errors occurred earlier on average within a trial for longer feedback delays. Although longer delays caused slower speech, this effect was mediated by the run number (time in the experiment) and small compared with those in previous studies.ConclusionsDAF drives a specific pattern of serial order errors. The dominant pattern of vowel and syllable repetition errors suggests possible mechanisms whereby DAF drives changes to the activity in speech planning representations, yielding errors. These mechanisms are outlined with reference to the GODIVA (Gradient Order Directions Into Velocities of Articulators) model of speech planning and production.Supplemental Materialhttps://doi.org/10.23641/asha.19601785