Previous research has focused on the event-related potential of the old/new effect, but the mechanism for cognitive conflict and subsequent integration processing both induced by intermixed (old and new) stimuli have not been widely researched. This paper describes the effect of familiar stimuli mixed with new information and presented as intermixed stimuli. Three conditions were set within a study-test paradigm incorporating old, new, and intermixed conditions. The intermixed condition resulted in the lowest accuracy, thereby implying the greatest old/new effect. Moreover, compared with the old condition, the intermixed condition elicited a greater N270 as well as a stronger N400, while the new condition only induced a stronger N270. These results elucidate that when new information is intermixed with old information, the old/new effect is more pronounced, indicating that intermixed stimuli are possibly more difficult to integrate than old and new stimuli.

以前的研究集中在新旧效应的事件相关电位上，但由混合（新旧）刺激引起的认知冲突和后续整合处理的机制尚未得到广泛研究。本文描述了熟悉的刺激与新信息混合并呈现为混合刺激的效果。在包含旧条件、新条件和混合条件的研究-测试范式中设置了三个条件。混合条件导致最低准确度，从而暗示最大的旧/新效果。此外，与旧条件相比，混合条件引发了更大的 N270 和更强的 N400，而新条件仅引发了更强的 N270。这些结果表明，当新信息与旧信息混合时，