Temporal cortex reflects effects of sentence context on phonetic processing.

Temporal cortex reflects effects of sentence context on phonetic processing.
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DOI:
10.1162/jocn_a_00351
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发表时间:
2013-05
影响因子:
3.2
通讯作者:
Blumstein SE
Blumstein SE
中科院分区:
医学3区
文献类型:
--
作者:
Guediche S;Salvata C;Blumstein SE

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听众对声学呈现语音的感知受到许多不同信息源的限制,这些信息源来自其他感官模式和更抽象的高级语言上下文。一个悬而未决的问题是感知过程如何受到这些其他信息来源的影响并与之相互作用。在本研究中,我们使用功能磁共振成像来检查先前的句子片段含义对两个可能的目标词分类的影响,这两个目标词的初始辅音的声学语音特征不同,即发声时间(VOT)。具体来说,我们操纵句子上下文的偏见(有偏见、中性)和目标类型(歧义、明确)。我们的结果表明,这两个因素之间的相互作用出现在颞叶皮层的一个簇中,包括左侧颞中回和颞上回。这些交互的轨迹和模式支持语音处理的交互视图,并表明输入的质量和上下文的潜在偏差共同相互作用并调节神经激活模式。
Listeners’ perception of acoustically presented speech is constrained by many different sources of information that arise from other sensory modalities and from more abstract higher-level language context. An open question is how perceptual processes are influenced by and interact with these other sources of information. In this study, we use fMRI to examine the effect of a prior sentence-fragment meaning on the categorization of two possible target words that differ in an acoustic phonetic feature of the initial consonant, voice-onset time (VOT). Specifically, we manipulate the bias of the sentence context (biased, neutral) and the target type (ambiguous, unambiguous). Our results show that an interaction between these two factors emerged in a cluster in temporal cortex encompassing the left middle temporal gyrus and the superior temporal gyrus. The locus and pattern of these interactions support an interactive view of speech processing and suggest that both the quality of the input and the potential bias of the context together interact and modulate neural activation patterns.
DOI: 10.1162/0898929054985473
发表时间: 2005-09-01
影响因子: 3.2
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通讯作者: Rissman, J
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