Grand average global field power (GFP) for stimuli presented in quiet background for each attention condition (Passive [green]; Attend Left [blue]; Attend Right [red]).

The five panels represent trials in which the target arrived at each of the five horizontal speaker locations (from left to right: -60° to +60°). Grey shaded regions represent standard error of the mean, and black horizontal markers represent time latencies in which a significant difference was found between Attend Left and Attend Right conditions in a paired-sample t-test (alpha = 0.5; n = 18).