Figure 2
(A) The topographic distribution of prestimulus alpha power (8–12 Hz) for cue-perceived minus not-perceived trials. To test this difference, power was averaged at -250 ms pre-cue across 8–12 Hz and across an occipitoparietal region of interest (ROI). However, a Bayesian generalized mixed-effect regression analysis showed no statistical evidence that prestimulus alpha power differed between cue-perceived and not-perceived trials. (B) The average preferred prestimulus alpha phase for cue-perceived (blue lines) and not-perceived trials (red lines). A Bayesian generalized mixed-effect regression analysis showed moderate evidence that these preferred prestimulus alpha phases were different between these conditions. The vector length represents intertrial phase coherency (ITPC). Data points reflect the preferred phase and ITPC for individual subjects. Phase measures of the prestimulus alpha activity were extracted from a window centered at -250 ms (relative to cue stimulus onset) at electrode site POz.
