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首页> 外文期刊>Neuropsychologia >Auditory semantic processing in dichotic listening: Effects of competing speech, ear of presentation, and sentential bias on N400s to spoken words in context
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Auditory semantic processing in dichotic listening: Effects of competing speech, ear of presentation, and sentential bias on N400s to spoken words in context

机译：二项式听力中的听觉语义处理：竞争性语音，演讲的耳朵和上下文中N400对口语的偏见的影响

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The effects of ear of presentation and competing speech on N400s to spoken words in context were examined in a dichotic sentence priming paradigm. Auditory sentence contexts with a strong or weak semantic bias were presented in isolation to the right or left ear, or with a competing signal presented in the other ear at a SNR of -12 dB. Target words were congruent or incongruent with the sentence meaning. Competing speech attenuated N400s to both congruent and incongruent targets, suggesting that the demand imposed by a competing signal disrupts the engagement of semantic comprehension processes. Bias strength affected N400 amplitudes differentially depending upon ear of presentation: weak contexts presented to the le/RH produced a more negative N400 response to targets than strong contexts, whereas no significant effect of bias strength was observed for sentences presented to the re/LH. The results are consistent with a model of semantic processing in which the RH relies on integrative processing strategies in the interpretation of sentence-level meaning. (C) 2014 Elsevier Ltd. All rights reserved.
机译：在二分句启动模式中考察了演讲和竞争性演讲对N400s语音对口语单词的影响。带有强或弱语义偏见的听觉句子上下文分别以右耳或左耳呈现，或者以另一只耳朵的竞争信号以-12 dB的SNR呈现。目标词与句子含义一致或不一致。竞争性语音使N400减弱了对同等和不对等的目标的影响，这表明竞争信号所施加的需求破坏了语义理解过程的参与。偏倚强度取决于演讲的耳朵，对N400幅度的影响不同：偏向le / RH的弱情境比强境对N400的目标产生更大的负面N400反应，而偏向re / LH的句子则没有明显的偏见强度影响。结果与语义处理模型一致，在该模型中，RH在解释句子级含义时依赖于综合处理策略。 （C）2014 Elsevier Ltd.保留所有权利。

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