Groh-Bordin Christian, Frings Christian
Clinical Neuropsychology Unit, Department of Psychology, Saarland University, Saarbruecken, Germany.
Brain Cogn. 2009 Nov;71(2):92-8. doi: 10.1016/j.bandc.2009.04.005. Epub 2009 Jul 19.
Responses to probe targets that have been distractors in a prime display are slower than responses to unrepeated stimuli, a finding labeled negative priming (NP). However, without probe distractors the NP effect usually diminishes. The present study is the first to investigate ERP correlates of NP without probe distractors to shed light on the processes underlying NP. Based on existing findings in the field, we analyzed two ERP correlates that have been associated with the visual NP effect so far, namely the N200 and the P300. As expected, no behavioral NP effect as well as no N200 modulation emerged. However, the P300 component was enhanced when a prime distractor was repeated as the probe target. This effect is interpreted as reflecting automatic retrieval of the prime episode occurring independently of the presence of probe distractors.
对在启动显示中曾作为干扰项的探测目标的反应，比对未重复刺激的反应要慢，这一发现被称为负启动（NP）。然而，若没有探测干扰项，NP效应通常会减弱。本研究首次探究了无探测干扰项时NP的事件相关电位（ERP）关联，以阐明NP背后的过程。基于该领域现有的研究结果，我们分析了两个迄今已与视觉NP效应相关联的ERP关联，即N200和P300。不出所料，未出现行为NP效应以及N200调制。然而，当启动干扰项作为探测目标被重复时，P300成分增强。这一效应被解释为反映了启动事件的自动提取，该提取独立于探测干扰项的存在而发生。
