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首页> 外文期刊>Neuroscience: An International Journal under the Editorial Direction of IBRO >EVENT-RELATED POTENTIALS REVEAL TASK-DEPENDENCE AND INTER-INDIVIDUAL DIFFERENCES IN NEGATION PROCESSING DURING SILENT LISTENING AND EXPLICIT TRUTH-VALUE EVALUATION
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EVENT-RELATED POTENTIALS REVEAL TASK-DEPENDENCE AND INTER-INDIVIDUAL DIFFERENCES IN NEGATION PROCESSING DURING SILENT LISTENING AND EXPLICIT TRUTH-VALUE EVALUATION

机译：沉默聆听和显式真值评估期间的否定处理中与事件相关的电位显示任务依赖性和个体间差异

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摘要

In sentences such as dogs cannot fly/bark, evaluation of the truth-value of the sentence is assumed to appear after the negation has been integrated into the sentence structure. Moreover negation processing and truth-value processing are considered effortful processes, whereas processing of the semantic relatedness of the words within sentences is thought to occur automatically. In the present study, modulation of event-related brain potentials (N400 and late positive potential, LPP) was investigated during an implicit task (silent listening) and active truth-value evaluation to test these theoretical assumptions and determine if truth-value evaluation will be modulated by the way participants processed the negated information implicitly prior to truth-value verification. Participants first listened to negated sentences and then evaluated these sentences for their truth-value in an active evaluation task. During passive listening, the LPP was generally more pronounced for targets in false negative (FN) than true negative (TN) sentences, indicating enhanced attention allocation to semantically-related but false targets. N400 modulation by truth-value (FN > TN) was observed in 11 out of 24 participants. However, during active evaluation, processing of semantically-unrelated but true targets (TN) elicited larger N400 and LPP amplitudes as well as a pronounced frontal negativity. This pattern was particularly prominent in those 11 individuals, whose N400 modulation during silent listening indicated that they were more sensitive to violations of the truth-value than to semantic priming effects. The results provide evidence for implicit truth-value processing during silent listening of negated sentences and for task dependence related to inter-individual differences in implicit negation processing. (C) 2014 IBRO. Published by Elsevier Ltd. All rights reserved.
机译：在诸如狗不能飞/吠的句子中，假定否定性已被整合到句子结构中之后，才出现对句子真值的评估。此外，否定处理和真值处理被认为是费力的处理，而句子中单词的语义相关性的处理被认为是自动发生的。在本研究中，在隐式任务（静默聆听）和主动真值评估期间研究了与事件相关的脑电势（N400和晚期正电位，LPP）的调制，以测试这些理论假设并确定真值评估是否会可以通过参与者在真值验证之前暗中处理否定信息的方式进行调制。参与者首先听取否定的句子，然后在积极的评估任务中评估这些句子的真值。在被动收听过程中，与否定（TN）句子相比，否定（FN）目标中的LPP通常更为明显，这表明对与语义相关但为假的目标的注意力分配得到了增强。在24位参与者中，有11位观察到由真值（FN> TN）调制的N400。但是，在主动评估过程中，处理语义上不相关但真实的目标（TN）会引起较大的N400和LPP振幅以及明显的额叶负性。这种模式在这11个人中尤为突出，他们在静默聆听期间进行N400调制表明他们对违反真值的敏感度高于对语义启动效应的敏感度。结果为在否定性句子静默聆听期间进行隐式真值处理提供了证据，并为隐式否定处理中与个体间差异相关的任务依赖性提供了证据。 （C）2014年IBRO。由Elsevier Ltd.出版。保留所有权利。

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