Partial Compensation for Altered Auditory Feedback: A Tradeoff with Somatosensory Feedback?
Partial Compensation for Altered Auditory Feedback: A Tradeoff with Somatosensory Feedback?
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DOI：
10.1177/0023830911417802
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发表时间：
2012-06-01
影响因子：
1.8
通讯作者：
Johnson, Keith
中科院分区：
文献类型：
--
作者：
Katseff, Shira;Houde, John;Johnson, Keith
人们知道，说话者只能部分地补偿实验引起的听觉反馈变化。在一个典型的实验中，说话者可能会听到他们的F1反馈移动得更高（例如，使//听起来像/ae/），并通过在随后的讲话中将F1降低约四分之一的距离来补偿。在这里，我们试图通过研究说话者如何对听觉反馈中逐渐增加的阶梯上的每一步做出反应来描述和理解部分补偿。受试者佩戴了一种改变他们的真实的听觉反馈的装置。他们被要求重复视觉呈现的hVd刺激词，同时在360次试验中逐步改变反馈。我们使用了一种新的分析方法来计算每个受试者在每个补偿步骤相对于他们的基线的补偿。结果表明，受试者补偿小的反馈变化比大的变化。我们认为，这种模式是一致的元音目标，包括听觉和体感信息，和语音运动控制系统，是由听觉和体感反馈的差分加权驱动。
Talkers are known to compensate only partially for experimentally-induced changes to their auditory feedback. In a typical experiment, talkers might hear their F1 feedback shifted higher (so that /epsilon/ sounds like /ae/, for example), and compensate by lowering F1 in their subsequent speech by about a quarter of that distance. Here, we sought to characterize and understand partial compensation by examining how talkers respond to each step on a staircase of increasing shifts in auditory feedback.Subjects wore an apparatus which altered their real time auditory feedback. They were asked to repeat visually-presented hVd stimulus words while feedback was altered stepwise over the course of 360 trials. We used a novel analysis method to calculate each subject's compensation at each compensation step relative to their baseline. Results demonstrated that subjects compensated more for small feedback shifts than for larger shifts. We suggest that this pattern is consistent with vowel targets that incorporate auditory and somatosensory information, and a speech motor control system that is driven by differential weighting of auditory and somatosensory feedback.