Fig. 3
From: Benchmarking the utility of dry-electrode electroencephalography for clinical trials
Resting state EEG. (a) Resting state EEG activity was recorded for 5 min during an eyes open and eyes closed condition. The participants fixated their gaze on a centrally displayed fixation dot during the eyes open condition. (b) Average power spectra during the eyes open and eyes closed conditions. Error bars reflect bootstrap estimates of the 95% confidence interval for the average across participants. Data was pooled across days and averaged across electrodes. (c) Average ratio of eyes closed to eyes open power. Error bars reflect bootstrap estimates of the 95% confidence interval for the average across participants. Data was pooled across days and averaged across electrodes. (d) Intraclass correlations (ICC) for power features derived for eyes open and eyes closed conditions. The absolute agreement and consistency are shown for each device as compared to the standard EEG. The test–retest reliability compared the features between the test (Day 1) and retest (Day 8) recordings. The standard EEG was also subsampled at only 1020 positions making the coverage comparable in number and locations to the dry-electrode EEG devices, see Std. EEG (1020).
