Danker Jared F, Hwang Grace M, Gauthier Lynne, Geller Aaron, Kahana Michael J, Sekuler Robert
Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, USA.
Psychophysiology. 2008 Sep;45(5):784-93. doi: 10.1111/j.1469-8986.2008.00672.x. Epub 2008 May 30.
The early and late components of the event-related potential (ERP) Old-New effect are well characterized with respect to long-term memory, and have been associated with processes of familiarity and recollection, respectively. Now, using a short-term memory paradigm with verbal and nonverbal stimuli, we explored the way that these two components respond to variation in recency and stimulus type. We found that the amplitude of the early component (or frontal N400, FN400) showed Old-New effects only for verbal stimuli and increased with recency. In contrast, the later component (or late positive component, LPC) showed Old-New effects across a range of stimulus types and did not scale with recency. These results are consistent with the way that these same ERP components have been characterized in long-term memory, supporting the idea that some of the same processes underlie long- and short-term item recognition.
事件相关电位（ERP）新旧效应的早期和晚期成分在长期记忆方面已得到充分表征，并且分别与熟悉度和回忆过程相关。现在，我们使用一个包含言语和非言语刺激的短期记忆范式，探究了这两个成分对近期性和刺激类型变化的反应方式。我们发现，早期成分（或额叶N400，FN400）的波幅仅在言语刺激中表现出新旧效应，并且随近期性增加。相比之下，晚期成分（或晚期正波，LPC）在一系列刺激类型中均表现出新旧效应，且不随近期性变化。这些结果与这些ERP成分在长期记忆中的表征方式一致，支持了长期和短期项目识别背后存在一些相同过程的观点。
