Eyes-closed EEG analysis
Eyes-closed EEG data consisted of a 2-minute pre-task and a 2-minute
post-task recording, which were highly correlated with each other (r =
0.91, P<0.001). Pre- and post-task recordings were therefore
analysed as one dataset for each participant. We detected a moderate
correlation in the expected direction ( r = -0.43, P<0.05)
between eyes-closed peak alpha frequency and flash-fusion thresholds
(Fig 3, left). We found no correlation between eyes-closed alpha power
and flash-fusion thresholds (r = 0.14, P>0.05).