The role of morphology in phoneme prediction: Evidence from MEG
The role of morphology in phoneme prediction: Evidence from MEG
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DOI：
10.1016/j.bandl.2013.11.004
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发表时间：
2014-02-01
影响因子：
2.5
通讯作者：
Marantz, Alec
中科院分区：
文献类型：
--
作者：
Ettinger, Allyson;Linzen, Tal;Marantz, Alec
有大量的神经证据表明形态（词内部结构）在视觉词识别中的作用。我们将这项工作扩展到听觉单词识别，利用最近的证据表明音素预测是这一过程的核心。在脑磁图 (MEG) 研究中，我们将形态复杂性（bruis-er 与 bourbon）与词尾的可预测性（bourbon 与 burble）进行了比较。高预测误差（令人惊讶）导致听觉皮层活动增加。对于形态复杂的单词，这种效果会增强。此外，我们还为每个时间点计算了与该时间点感知到的音素相对应的惊喜，以及队列熵，它量化了截至该时间点与字符串前缀兼容的单词之间的竞争。较高的惊讶度会增加单词结尾处的神经活动，而较高的熵会在单词出现后不久减少神经活动。这些结果强化了形态和音素预测在口语单词识别中的作用。 (C) 2014 Elsevier Inc. 保留所有权利。
There is substantial neural evidence for the role of morphology (word-internal structure) in visual word recognition. We extend this work to auditory word recognition, drawing on recent evidence that phoneme prediction is central to this process. In a magnetoencephalography (MEG) study, we crossed morphological complexity (bruis-er vs. bourbon) with the predictability of the word ending (bourbon vs. burble). High prediction error (surprisal) led to increased auditory cortex activity. This effect was enhanced for morphologically complex words. Additionally, we calculated for each timepoint the surprisal corresponding to the phoneme perceived at that timepoint, as well as the cohort entropy, which quantifies the competition among words compatible with the string prefix up to that timepoint. Higher surprisal increased neural activity at the end of the word, and higher entropy decreased neural activity shortly after word onset. These results reinforce the role of morphology and phoneme prediction in spoken word recognition. (C) 2014 Elsevier Inc. All rights reserved.