Fig. 7: Peri-event fluctuations of attention strength.
From: Rhythmic sampling of multiple decision alternatives in the human brain
a Attentional event-triggered average of the z-scored attention strength, i.e., vector length. The colored lines and shaded area indicate the average and SEM over events and participants (nparticipant = 20) separately for stay (orange) and switch events (green). Pre- and post-event epochs are highlighted in blue and purple. Gray lines display full 11 Hz cycles from the event. b The same data as in (a) detrended individually pre- (− 0.2 s to − 0.05 s) and post-event (0.05 s to 0.2 s). c Peri-event attention strength difference between switch and stay, displayed as the ratio of average activity over a time window from – 0.15 to − 0.05 (Pre, blue) and 0.05 to 0.15 (Post, purple). Bars and vertical lines denote the mean and SEM over participants. Colored dots and gray lines indicate the single-participant ratio (n = 20) and the difference from pre- to post-event, respectively. Asterisks indicate significant differences (two-sided t test(19), uncorrected p-values: ppre = 1.43*10−7, ppost = 5.22*10−7, ppost-pre = 8.31*10−7). d Dominant peri-event fluctuation frequencies based on (b). N denotes the number of participants with two peaks per interval (see Methods). Box plots display the 25%–75% percentile range (box), median (red line), whiskers maximally up to 1.5 times the inter-quartile range and outliers (red plus). e Correlation between the attentional event probability (Supplementary Fig. S11) and the amplitude of the attentional fluctuations (Fig. 3e) over the stimulus presentation period. Lines depict the average, shaded areas the SEM over participants. Thick lines indicate significant differences (two-sided t test(19), pFDR < 0.05; range FDR-corrected p17.4-59Hz = [0.0003; 0.0447]) and crosses a statistical trend for significance (two-sided t test(19), uncorrected p10.3Hz = 0.0692, p11.3Hz = 0.0686). f Schematic - pre-event activity dissociation and the reset of attentional fluctuations at each event. The schematic was created using Affinity Designer (Version 1.10.8, Serif Europe Ltd).
