The late positive potential (LPP) is an event related potential (ERP) that has been used to study the processing of emotional stimuli and has been proposed as a biomarker for depression. However, to relate the LPP to trait-like individual differences it is important to first determine its psychometric properties. The current study assessed the reliability and internal consistency of the LPP in a large adult sample of women. We assessed the LPP following pleasant, unpleasant, and neutral images at baseline (n = 266) and approximately eight weeks later (n = 193). The LPP demonstrated good test-retest reliability and good-to-excellent internal consistency at both time points. The LPP response was not associated with concurrent depressive symptoms. These findings suggest the LPP is a relatively stable and reliable measure of emotional processing, but further research with larger samples and more elevated depression scores may be needed in order to clarify the associations between depression and LPP.

晚期正电位 (LPP) 是一种事件相关电位 (ERP)，已被用于研究情绪刺激的处理过程，并已被提议作为抑郁症的生物标志物。然而，要将 LPP 与类似特质的个体差异联系起来，重要的是首先确定其心理测量特性。当前的研究在大型成年女性样本中评估了 LPP 的可靠性和内部一致性。我们在基线 ( n = 266) 和大约八周后 ( n= 193）。LPP 在两个时间点都表现出良好的重测信度和良好到优秀的内部一致性。LPP 反应与并发抑郁症状无关。这些发现表明 LPP 是一种相对稳定和可靠的情绪处理量度，但可能需要对更大样本和更高的抑郁评分进行进一步研究，以阐明抑郁与 LPP 之间的关联。