Eyes-closed EEG analysis
Participants completed the CFF task prior to EEG recording. Mean CFF was 50.01 Hz (SD = 6.32). We found no correlation between the task and eyes-closed peak alpha frequency (Pearson’s r = 0.01, P = 0.95) or peak alpha power (Pearson’s r = 0.14, P = 0.35). QQ-plots showed a slight deviation from normality for the CFF task data. We therefore also conducted our correlation test using Spearman’s rank correlation, but this did not significantly alter analysis results: Spearman’s r = 0.04, P = 0.83.