Human attention-guided visual perception is governed by rhythmic oscillations and aperiodic timescales
Fig 2
Behavioral timescales increase when multiple locations are sampled.
(A) Schematic of task designs. Participants fixated a central cross and were presented with a cue, which indicated the location participants should covertly attend to. After a variable cue-target interval a target appeared in either the cued or non-cued location and participants responded with a button press. In the first task participants only had to sample two locations, while in the second task, participants had to sample four locations. (B) Left: demeaned, time-resolved RTs as a function of the cue-target interval for one exemplary participant (two locations: red; four locations blue). Middle: power spectrums with different peak frequencies. Right: the autocorrelation function and the respective timescales. (C) Correlation between timescales and behavior power per frequency (four location task). (D) Behavior power did not correlate with behavioral timescales (no cluster identified; red lines represent significance threshold; four location task; comparable results for two location task). (E) Timescales are longer as well as more variable when multiple locations need to be sampled in comparison to only two locations (p = 0.0359). The individual values for panel E are included in S2 Data, Experiment 1 sheet.