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Typicality effect on N400 ERP in categories despite differences in semantic processing

机译：尽管语义处理存在差异，但类别对N400 ERP的典型性影响

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We investigate the effect of word typicality - the degree of membership of a word to its superordinate category - on the N400 event-related potential (ERP) using a single trial detection approach based on spatiotemporal beamforming. Unlike the norm in studies, where mostly concrete categories are used (imaginable objects), we considered a total of 6 basic categories: three abstract and unimaginable (emotion, event, illness), one abstract yet clearly imaginable (color), and two concrete categories, a coherent (mammals) and an incoherent one (furniture). We also investigated the source of the observed N400 ERPs in the brain to detect possible differences between the semantic processing of these categories. Our results show that, independently of word abstractness or concreteness, word typicality has a clear effect on N400 both in terms of amplitude and scalp localization as well as in N400 sources, all of which in turn is indicative of differences in difficulty of word processing.
机译：我们使用基于时空波束形成的单一试验检测方法，研究了单词典型性（单词的上级隶属度）对N400事件相关电位（ERP）的影响。与研究中的规范不同，研究中的规范主要使用具体类别（可想象的对象），我们总共考虑了6个基本类别：三个抽象和不可想象的（情感，事件，疾病），一个抽象但清晰可想象的（颜色）和两个具体的类别类别，一个连贯的（哺乳动物）和一个不连贯的（家具）。我们还调查了大脑中观察到的N400 ERP的来源，以检测这些类别的语义处理之间可能存在的差异。我们的结果表明，与词的抽象性或具体性无关，词的典型性在幅度和头皮定位以及N400来源方面对N400都有明显的影响，所有这些反过来又表明了词处理难度的差异。

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