Bernstein Center for Computational Neuroscience Göttingen, Göttingen, Germany.
Psychophysiology. 2010 Sep;47(5):921-30. doi: 10.1111/j.1469-8986.2010.00989.x. Epub 2010 Mar 4.
Event-related potentials (ERPs) were obtained from an identity priming task, where a green target had to be selected against a superimposed red distractor. Several priming conditions were realized in a mix of control (CO), negative priming (NP), and positive priming (PP) trials. PP and NP effects in reaction times (RTs) were significant. ERP results conceptually replicate earlier findings of left-posterior P300 reduction in PP and NP trials compared to CO. This ERP effect may reflect the detection of prime-probe similarity corresponding to the concept of a retrieval cue. A novel finding concerned amplitude increase of the frontal late positive complex (LPC) in the order NP, CO, and PP. NP therefore seemed to induce brain activity related to cognitive control and/or memory processes, with reduced LPC amplitude indicating effortful processing. Overall, retrieval-based explanations of identity NP are supported.
事件相关电位（ERPs）是通过身份启动任务获得的，其中必须在叠加的红色干扰项上选择绿色目标。在对照（CO）、负启动（NP）和正启动（PP）试验的混合中实现了几种启动条件。反应时间（RT）中的 PP 和 NP 效应显著。ERP 结果在概念上复制了早期的发现，即在 PP 和 NP 试验中与 CO 相比，左后 P300 减少。这种 ERP 效应可能反映了与检索线索概念相对应的启动-探测相似性的检测。一个新的发现涉及到在 NP、CO 和 PP 的顺序中额部晚期正复合（LPC）的振幅增加。因此，NP 似乎诱导了与认知控制和/或记忆过程相关的大脑活动，而 LPC 振幅的降低则表明需要付出努力进行处理。总的来说，基于检索的身份 NP 解释得到了支持。
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