If an ERP score is to reflect a trait-like characteristic or indicate if an intervention had an effect over time, adequate internal consistency and test-retest reliability of that ERP score across multiple testing sessions must be established. The current paper is a companion paper to Clayson et al. (current issue) that applied generalizability theory formulas and the ERP Reliability Analysis (ERA) Toolbox to assess test-retest and internal consistency in a dataset of event-related brain potentials (ERPs) assessing food-related cognition. Although ERPs in response to food cues have been related to eating behaviors or assessed during a health intervention, the reliability of food-related ERPs generally has not been tested. Within the generalizability theory framework, we assessed the stability (cf., test-retest reliability) and equivalence (cf., internal consistency) of four commonly used food-related ERPs: the late positive potential (LPP), centro-parietal P3, N2, and fronto-central P3. 132 participants (92 female) completed two testing sessions held two weeks apart. During the sessions, participants completed a passive food viewing task, a high-calorie go/no-go task, and a low-calorie go/no-go task in a counterbalanced fashion. Coefficients of equivalence for all ERPs were excellent (>0.96). Coefficients of stability were moderate-to-low, with N2 scores on the low-calorie go/no-go task showing the highest test-retest reliability (>0.65) and fronto-central P3 scores on the high-calorie go/no-go task showing the lowest (0.48). Results suggest the ERPs in the current dataset have high internal consistency and would be reliable in detecting individual differences, but their test-retest reliability is limited. Reliability of these ERPs may be improved with changes in task stimuli, task instructions, and study procedures.

如果 ERP 分数要反映类似特质的特征或表明干预是否随着时间的推移产生影响，则必须在多个测试阶段建立该 ERP 分数的足够内部一致性和重测信度。目前的论文是 Clayson 等人的配套论文。（当前问题）应用泛化理论公式和 ERP 可靠性分析 (ERA) 工具箱来评估事件相关脑电位 (ERP) 数据集中的重测和内部一致性，该数据集用于评估与食物相关的认知。尽管响应食物线索的 ERP 与饮食行为有关或在健康干预期间进行了评估，但与食物相关的 ERP 的可靠性通常尚未经过测试。在泛化理论框架内，我们评估了稳定性（参见，重测信度）和等价性（参见，四种常用的食物相关 ERP 的内部一致性：晚期正电位 (LPP)、中央顶叶 P3、N2 和额中央 P3。132 名参与者（92 名女性）完成了相隔两周的两次测试。在会议期间，参与者以平衡的方式完成了被动的食物观察任务、高热量的去/不去任务和低热量的去/不去任务。所有 ERP 的等效系数都非常好 (>0.96)。稳定性系数中等至低，低热量去/不去任务的 N2 分数显示最高的重测信度 (>0.65) 和高热量去/不去任务的额中央 P3 分数go 任务显示最低（0.48）。结果表明当前数据集中的 ERP 具有高度的内部一致性，并且在检测个体差异方面是可靠的，但他们的重测信度有限。这些 ERP 的可靠性可能会随着任务刺激、任务指令和学习程序的变化而提高。