Figure 4: (A) Both, the significant right hemispheric and trend level left hemispheric, source clusters are shown. The color bar indicates F-values. (B) The mean relative ssVEF power changes across source clusters in (A) are shown for the pre-cue baseline, post-cue unattended, and post-cue attended experimental phases separated by the pre-cue ring and fixationcross conditions. The error bars depict s. e. ms. * p < 0.05
As the observed effects were spread across different cortical regions within the visual cortex, mean ssVEF relative power changes for each region of interest (ROIs) were entered in a repeated measure ANOVA with within-subject factors pre-cue condition (rings vs. cross), experimental phase (pre-cue baseline, not attend and attend cued visual hemifield), and ROIs (V1, V2, precuneus, occipito-parietal cortex, hMT+, and inferior-temporal cortex). Relative power values for homologous left and right cortical areas that both covered significant clusters from the previous analysis were collapsed across hemispheres, whereas for the remaining ROIs only right hemisphere ssVEF responses entered the analysis.
A significant pre-cue condition by experimental phase by ROIs interaction, indicated that the previously reported pre-cue condition by experimental phase interaction is different depending on the ROI (F(10, 190) = 4.03, p = 0.008, ε = 0.11, η2 = 0.17). Therefore, the pre-cue condition by experimental phase interaction was assessed separately for ROI (see Figure 5A). At each ROI a significant pre-cue condition by experimental phase interaction was observed (Table 1).