Neurobiological evidence for voicing underspecification in English
Neurobiological evidence for voicing underspecification in English
复制标题
DOI：
10.1016/j.bandl.2015.10.007
复制
发表时间：
2016-01-01
影响因子：
2.5
通讯作者：
Durvasula, Karthik
中科院分区：
文献类型：
--
作者：
Hestvik, Arild;Durvasula, Karthik
在长期记忆中，构成单词的音素单元被编码为区分心理词典中的单词所必需的独特特征和特征值。欠规范理论认为，具有未标记特征值的音素甚至更抽象，因为在表示中完全省略了该特征。这使得单词中的音素表示比相同单词的完全指定的语音表示更稀疏。Eulitz和Lahiri(2004)证明了这一理论预测了失配负性(MMN)对音素对比反应的某些不对称性。我们通过证明在英语中喉部特征对比(即是什么使/d/和/t/不同)的大脑反应中的欠规范驱动的不对称来扩展这项研究。我们增加了一个新的测试，表明如果MMN范式被修改为鼓励形成语音记忆痕迹而不是音素记忆痕迹，这种不对称性就会消失。这一结果进一步增加了神经生物学证据，表明长期语音表征比语音表征更稀疏。(C)2015 Elsevier Inc.保留所有权利。
In long-term memory, the phoneme units that make up words are coded for the distinctive features and feature values that are necessary to distinguish between words in the mental lexicon. Underspecification theory says that the phonemes that have unmarked feature values are even more abstract in that the feature is omitted from the representation altogether. This makes phoneme representations in words more sparse than the fully specified phonetic representations of the same words. Eulitz and Lahiri (2004) demonstrated that this theory predicts certain asymmetries in the Mismatch Negativity (MMN) response to phoneme contrasts. We expand on this research by demonstrating underspecification-driven asymmetry in the brain response to laryngeal feature contrasts in English (i.e. what makes /d/ and /t/ different). We add a new test by showing that the asymmetry disappears if the MMN paradigm is modified to encourage the formation of phonetic memory traces instead of phonemic memory traces. This result adds further neurobiological evidence that long-term phonological representations are more sparsely represented than phonetic representations. (C) 2015 Elsevier Inc. All rights reserved.