Sentential influences on acoustic-phonetic processing: a Granger causality analysis of multimodal imaging data
Sentential influences on acoustic-phonetic processing: a Granger causality analysis of multimodal imaging data
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DOI：
10.1080/23273798.2015.1029498
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发表时间：
2016-01-01
影响因子：
2.3
通讯作者：
Olson, Bruna B.
中科院分区：
文献类型：
--
作者：
Gow, David W., Jr.;Olson, Bruna B.
句子语境影响听者识别语音歧义或感知退化语音的方式。不幸的是，固有的推理限制行为或BOLD成像结果的解释，使人们不清楚是否上下文直接影响知觉处理，或在知觉后的决策阶段的行为。在本文中，我们使用卡尔曼滤波器启用格兰杰因果分析的MRI约束MEG/EEG数据，以区分这些可能性。使用一个回顾性的探测验证任务，我们发现，原始的上下文强烈影响的词的解释与模糊的初始发声（如黄昏，TUSK）。这种行为背景效应与词汇表征相关的大脑区域对声学语音处理相关区域的影响增加相吻合。这些结果支持一个交互式的观点，句子语境对言语感知的影响。
Sentential context influences the way that listeners identify phonetically ambiguous or perceptual degraded speech sounds. Unfortunately, inherent inferential limitations on the interpretation of behavioural or BOLD imaging results make it unclear whether context influences perceptual processing directly, or acts at a post-perceptual decision stage. In this paper, we use Kalman-filter enabled Granger causation analysis of MRI-constrained MEG/EEG data to distinguish between these possibilities. Using a retrospective probe verification task, we found that sentential context strongly affected the interpretation of words with ambiguous initial voicing (e.g. DUSK-TUSK). This behavioural context effect coincided with increased influence by brain regions associated with lexical representation on regions associated with acoustic-phonetic processing. These results support an interactive view of sentence context effects on speech perception.