Fig. 2.

(A) Topographic plot of attentional differences in pre-stimulus alpha amplitude as assessed by paired samples t-test. Asterisks denote electrodes displaying statistically significant attentional modulation of alpha amplitude. (B) Grand average alpha phase at the cluster-level for the two perceptual outcomes in the pre-stimulus period. The grey shaded area depicts the time region where phase was statistically different between conditions. As the results depict the average phase across participants, the absence of phase consistency (e.g. − 0.2 to − 0.15 s) indicates time regions at which phase relationships were not consistent across participants or electrodes of interest.