Center for Mind & Brain, University of California-Davis, Davis, California, USA.
Psychophysiology. 2024 Jun;61(6):e14530. doi: 10.1111/psyp.14530. Epub 2024 Jan 28.
In research with event-related potentials (ERPs), aggressive filters can substantially improve the signal-to-noise ratio and maximize statistical power, but they can also produce significant waveform distortion. Although this tradeoff has been well documented, the field lacks recommendations for filter cutoffs that quantitatively address both of these competing considerations. To fill this gap, we quantified the effects of a broad range of low-pass filter and high-pass filter cutoffs for seven common ERP components (P3b, N400, N170, N2pc, mismatch negativity, error-related negativity, and lateralized readiness potential) recorded from a set of neurotypical young adults. We also examined four common scoring methods (mean amplitude, peak amplitude, peak latency, and 50% area latency). For each combination of component and scoring methods, we quantified the effects of filtering on data quality (noise level and signal-to-noise ratio) and waveform distortion. This led to recommendations for optimal low-pass and high-pass filter cutoffs. We repeated the analyses after adding artificial noise to provide recommendations for data sets with moderately greater noise levels. For researchers who are analyzing data with similar ERP components, noise levels, and participant populations, using the recommended filter settings should lead to improved data quality and statistical power without creating problematic waveform distortion.
在事件相关电位(ERP)的研究中,激进的滤波器可以显著提高信噪比并最大化统计功效,但也会导致显著的波形失真。尽管这种权衡已经得到了充分的记录,但该领域缺乏针对滤波器截止值的建议,这些建议需要定量地解决这两个相互竞争的考虑因素。为了填补这一空白,我们量化了一系列常见 ERP 成分(P3b、N400、N170、N2pc、失匹配负波、错误相关负波和侧化准备电位)的广泛的低通滤波器和高通滤波器截止值对从一组神经典型的年轻成年人记录的数据的影响。我们还检查了四种常见的评分方法(平均幅度、峰值幅度、峰值潜伏期和 50%面积潜伏期)。对于每个成分和评分方法的组合,我们量化了滤波对数据质量(噪声水平和信噪比)和波形失真的影响。这导致了最佳低通和高通滤波器截止值的建议。在向数据集中添加人工噪声后,我们重复了分析,以提供针对噪声水平稍高的数据集的建议。对于分析具有类似 ERP 成分、噪声水平和参与者群体的研究人员来说,使用推荐的滤波器设置应该可以提高数据质量和统计功效,而不会产生有问题的波形失真。
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