Department of Speech, Language, and Hearing Sciences, University of Connecticut, Storrs.
Department of Psychological Sciences, University of Connecticut, Storrs.
J Speech Lang Hear Res. 2024 Aug 5;67(8):2533-2547. doi: 10.1044/2024_JSLHR-24-00107. Epub 2024 Jul 26.
We investigated speech and nonspeech auditory processing of temporal and spectral cues in people who do and do not stutter. We also asked whether self-reported stuttering severity was predicted by performance on the auditory processing measures.
People who stutter ( = 23) and people who do not stutter ( = 28) completed a series of four auditory processing tasks online. These tasks consisted of speech and nonspeech stimuli differing in spectral or temporal cues. We then used independent-samples -tests to assess differences in phonetic categorization slopes between groups and linear mixed-effects models to test differences in nonspeech auditory processing between stuttering and nonstuttering groups, and stuttering severity as a function of performance on all auditory processing tasks.
We found statistically significant differences between people who do and do not stutter in phonetic categorization of a continuum differing in a temporal cue and in discrimination of nonspeech stimuli differing in a spectral cue. A significant proportion of variance in self-reported stuttering severity was predicted by performance on the auditory processing measures.
Taken together, these results suggest that people who stutter process both speech and nonspeech auditory information differently than people who do not stutter and may point to subtle differences in auditory processing that could contribute to stuttering. We also note that these patterns could be the consequence of listening to one's own speech, rather than the cause of production differences.
我们研究了不口吃者和口吃者对言语和非言语听觉处理的时间和频谱线索的处理。我们还询问了自我报告的口吃严重程度是否可以通过听觉处理测量的表现来预测。
口吃者（n=23）和不口吃者（n=28）在线完成了一系列四项听觉处理任务。这些任务包括在频谱或时间线索上有差异的言语和非言语刺激。然后，我们使用独立样本 t 检验来评估组间语音分类斜率的差异，以及使用线性混合效应模型来测试口吃和非口吃组之间非言语听觉处理的差异，以及口吃严重程度作为所有听觉处理任务表现的函数。
我们发现，在时间线索差异的连续体上的语音分类和在频谱线索差异的非言语刺激的辨别方面，口吃者和不口吃者之间存在统计学上显著的差异。自我报告的口吃严重程度的很大一部分方差可以通过听觉处理测量的表现来预测。
总的来说，这些结果表明，口吃者在处理言语和非言语听觉信息方面与不口吃者不同，这可能表明听觉处理存在细微差异，这可能对口吃产生影响。我们还注意到，这些模式可能是由于倾听自己的讲话，而不是产生差异的原因。
