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首页> 外文期刊>Brain research >Electrophysiological evidence for early interaction between talker and linguistic information during speech perception.
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Electrophysiological evidence for early interaction between talker and linguistic information during speech perception.

机译：语音感知过程中说话者和语言信息之间早期交互的电生理证据。

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This study combined behavioral and electrophysiological measurements to investigate interactions during speech perception between native phonemes and talker's voice. In a Garner selective attention task, participants either classified each sound as one of two native vowels ([epsilon] and [ae]), ignoring the talker, or as one of two male talkers, ignoring the vowel. The dimension to be ignored was held constant in baseline tasks and changed randomly across trials in filtering tasks. Irrelevant variation in talker produced as much filtering interference (i.e., poorer performance in filtering relative to baseline) in classifying vowels as vice versa, suggesting that the two dimensions strongly interact. Event-related potentials (ERPs) were recorded to identify the processing origin of the interference: an early disruption in extracting dimension-specific information or a later disruption in selecting appropriate responses. Processing in the filtering task was characterized by a sustained negativity starting 100 ms after stimulus onset and peaking 200 ms later. The early onset of this negativity suggests that interference originates in the cognitive effort required by listeners to extract dimension-specific information, a process that precedes response selection. In agreement with these findings, our results revealed numerous dimension-specific effects, most prominently in the filtering tasks.
机译：这项研究结合了行为和电生理测量，以调查在语音感知过程中本机音素与说话者语音之间的交互作用。在Garner选择性注意任务中，参与者要么将每种声音分类为两个原生元音（ε和[ae]）之一，而忽略了说话者，要么将其分类为两个男性说话者之一，而忽略了元音。在基准任务中，要忽略的维数保持不变，而在过滤任务中的各个试验之间，维数是随机变化的。说话者的不相关变化会在将元音归类为“元音”时产生同样多的过滤干扰（即，相对于基线而言，过滤性能较差），反之亦然，这表明这两个维度之间存在强烈的相互作用。记录与事件相关的电势（ERP），以识别干扰的处理源：在提取特定于维度的信息中的早期中断或在选择适当响应时的后续中断。过滤任务中的处理的特征在于，在刺激发生后100毫秒开始持续消极，并在200毫秒后达到峰值。这种消极情绪的早期发作表明，干扰源于听众提取特定维度信息所需的认知努力，这一过程在响应选择之前。与这些发现相一致，我们的结果揭示了许多特定于维度的效果，其中最突出的是过滤任务。

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