Semantic processing without conscious identification: evidence from event-related potentials.
Semantic processing without conscious identification: evidence from event-related potentials.
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DOI：
10.1037//0278-7393.26.4.973
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发表时间：
2000-07
期刊：
影响因子：
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通讯作者：
Georg Stenberg;Magnus Lindgren;Mikael Johansson;Andreas Olsson;Ingmar Rosén
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文献类型：
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作者：
Georg Stenberg;Magnus Lindgren;Mikael Johansson;Andreas Olsson;Ingmar Rosén
三个事件相关电位（ERP）实验研究语义内容是否可以从视觉呈现的单词，不能有意识地识别。向参与者展示类别标签，然后是掩蔽的，简短暴露的单词，这些单词要么是类别的范例，要么不是范例。任务是验证类别，必要时通过猜测，并识别单词，如果可能的话命名它。选择暴露持续时间，以便在大约一半的试验中进行识别。对于确定的话，有一个显着的差异，在类内和类外的话，因为N400组件的ERP反应。对于未识别的单词，有类似的差异，但差异较小。有意识的识别是使用各种方法定义的：口头报告，6个选择的强迫选择，和二元分类（在回归方法的背景下; A。G. Greenwald，M. R. Klinger，& E. S. Schuh，1995）。无论如何，对未识别单词的ERPs都显示出语义加工的证据。此外，有差异的神经元群体招募处理高于阈值与低于阈值的话，这表明质的差异。
Three event-related potential (ERP) experiments examined whether semantic content can be accessed from visually presented words that cannot be consciously identified. Category labels were shown to participants, followed by masked, briefly exposed words that were either exemplars of the category or not exemplars. The task was to verify the category, by guessing if necessary, and to identify the word, naming it if possible. Exposure durations were selected to allow identification in approximately half the trials. For identified words, there was a marked difference in the ERP response between in-category and out-of-category words because of an N400 component. For unidentified words, there was a similar although smaller difference. Conscious identification was defined using a variety of approaches: verbal report, 6-alternative forced choice, and binary categorization (in the context of the regression method; A. G. Greenwald, M. R. Klinger, & E. S. Schuh, 1995). By any definition, ERPs for unidentified words showed evidence of semantic processing. In addition, there were differences in the neuronal populations recruited to process above-threshold versus below-threshold words, suggesting qualitative differences.