By making use of event-related potential (ERP) technology, a randomized, double-blind, between-subject design study was performed in order to investigate whether OXT can weaken men’s self-other distinction during empathic responses to sad expressions. In the two experimental tasks, 39 male subjects were asked to either evaluate the emotional state shown in a facial stimulus (other-task) or to evaluate their own emotional responses (self-task). The results revealed that OXT reduced the differences in P2 (150–200 ms) amplitudes between sad and neutral expressions in the self-task but enhanced P2 to sad expressions in the other-task, indicating OXT’s role in integrating the self with others instead of separating them. In addition, OXT also reduced the LPC (400–600 ms) amplitudes between sad-neutral expressions in the self-task, implying that OXT’s weakening effects on the self-other distinction could occur at both the early and late cognitive control stages of the empathic response.

中文翻译：

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在对悲伤的共情反应过程中，催产素削弱了男性的自我其他区别：一项与事件相关的电位研究

通过利用事件相关电位 (ERP) 技术，进行了一项随机、双盲、受试者间设计研究，以研究 OXT 是否可以在对悲伤表达的共情反应中削弱男性的自我他者区分。在两项实验任务中，39 名男性受试者被要求评估面部刺激（其他任务）中显示的情绪状态或评估他们自己的情绪反应（自我任务）。结果表明，OXT 减少了自我任务中悲伤和中性表达之间 P2（150-200 ms）幅度的差异，但增强了其他任务中悲伤表达的 P2，表明 OXT 在将自我与他人整合中的作用而不是将它们分开。此外，OXT 还降低了自我任务中悲伤中性表达之间的 LPC（400-600 毫秒）幅度，