exceeded ± 100 μV within each trial (based on the same pre- and post-stimulus time regions) were also omitted from analysis. Using these criteria, 9.7% of trials were excluded. Additionally, across all subjects and electrodes, a total of 10 electrodes (out of 7392) became disconnected during recording, and were omitted from the analysis. Trials in which an incorrect response was made (i.e., an error of omission on go trials or an error of commission on no-go trials) were excluded from analysis, with 7.75% of trials removed. After preprocessing, the data were averaged across trials within stimulus class (i.e., go, no-go) individually for each participant. Go trials were segmented into three groups of every third go (e.g., a sequence of go-go-go-go would be grouped as 1, 2, 3, 1, respectively) to equate the number of trials between go and no-go conditions submitted to the principal components analysis (see below), and go trials were then averaged together post-PCA for statistical analysis.
