Department of Cognitive Sciences, University of California, Irvine, Irvine, California, USA.
Department of Language Science, University of California, Irvine, Irvine, California, USA.
Eur J Neurosci. 2022 Oct;56(8):5274-5286. doi: 10.1111/ejn.15816. Epub 2022 Sep 14.
Forward entrainment refers to that part of the entrainment process that persists after termination of an entraining stimulus. Hickok et al. (2015) reported forward entrainment in signal detection that lasted for two post-stimulus cycles. In a recent paper, Sun et al. (2021) reported new data which suggested an absence of entrainment effects (Eur. J. Neurosci, 1-18, doi.org/10.1111/ejn.15367). Here we show that when Sun et al.'s data are analysed using unbiased detection-theoretic measures, a clear antiphasic bicyclic pattern of entrainment is observed. We further show that the measure of entrainment strength used by Sun et al., the normalized Fourier transform of performance curves, is not only erroneously calculated but is also unreliable in estimating entrainment strength due to signal-processing artifacts.
前向同步是指在刺激终止后仍然存在的同步过程的一部分。Hickok 等人(2015)报告了信号检测中的前向同步,其持续时间为两个刺激后周期。在最近的一篇论文中,Sun 等人(2021)报告了新的数据,表明不存在同步效应(Eur. J. Neurosci, 1-18, doi.org/10.1111/ejn.15367)。在这里,我们表明,当使用无偏检测理论措施分析 Sun 等人的数据时,可以观察到一个清晰的反相双周期同步模式。我们进一步表明,Sun 等人使用的同步强度度量,即性能曲线的归一化傅里叶变换,不仅计算错误,而且由于信号处理伪影,在估计同步强度时也不可靠。