Speaking rhythmically can shape hearing
Speaking rhythmically can shape hearing
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DOI：
10.1038/s41562-020-00962-0
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发表时间：
2020-10-12
影响因子：
29.9
通讯作者：
Poeppel, David
中科院分区：
文献类型：
--
作者：
Assaneo, M. Florencia;Rimmele, Johanna M.;Poeppel, David
有证据表明，来自运动系统的时间预测可以增强听觉感知。然而，在言语知觉中，我们缺乏知觉被生产所调节的证据。在这里，我们展示了一种行为协议，它捕捉到了这种听觉-运动相互作用的存在。受试者在产生周期性音节序列后立即进行音节辨别任务。研究人员探索了两种语速：自然语速(个人偏好)和固定的非自然语速(2赫兹)。使用解码的方法，我们证明知觉表现是由参与者自己的运动节奏决定的刺激阶段所调制的。值得注意的是，对于“自然”和“非自然”比率，这一发现仅限于具有可量化的听觉-运动耦合的人群的一部分。观察到的模式与假设听觉和语言运动皮质双向相互作用的神经模型兼容。至关重要的是，只有当模型包含了听觉-运动连接强度的个体差异时，该模型才能与实验结果相匹配。表明语音产生的时间安排可以促进感知。根据听觉-运动皮质连接强度的不同，个体是否使用运动计时也不同。
Evidence suggests that temporal predictions arising from the motor system can enhance auditory perception. However, in speech perception, we lack evidence of perception being modulated by production. Here we show a behavioural protocol that captures the existence of such auditory-motor interactions. Participants performed a syllable discrimination task immediately after producing periodic syllable sequences. Two speech rates were explored: a 'natural' (individually preferred) and a fixed 'non-natural' (2 Hz) rate. Using a decoding approach, we show that perceptual performance is modulated by the stimulus phase determined by a participant's own motor rhythm. Remarkably, for 'natural' and 'non-natural' rates, this finding is restricted to a subgroup of the population with quantifiable auditory-motor coupling. The observed pattern is compatible with a neural model assuming a bidirectional interaction of auditory and speech motor cortices. Crucially, the model matches the experimental results only if it incorporates individual differences in the strength of the auditory-motor connection.Assaneo et al. show that speech production timing can facilitate perception. Individuals differed in whether they utilized motor timing depending on the auditory-motor cortex connection strength.