delta measures with conventional time-domain N2 and P3 ERP measures in data from a go/no-go task using the TF-PCA approach described above (Bernat et al., 2005), in the same manner as applied previously to gambling feedback data (Bernat et al., 2011). Relative to previous reports of amplitude increases for both N2 time-domain and TF theta components in relation to no-go stimuli, we hypothesized that response inhibition (no-go) would produce a larger theta response than response commission (go). Relative to consistent reports of increased amplitude of time-domain P3 component measures, we hypothesized that no-go trials would be associated with increased delta band activity, relative to go stimuli. We hypothesized that due to increases in both theta and delta associated with no-go stimuli (unlike the gambling-feedback theta and delta effects, which were in opposing directions), the combination of separable phase dynamics would result in an attenuated go/no-go effect at N2 and an enhanced go/no-go effect at P3 as measured in the time-domain. In summary, the two main goals of the current study were: 1) to assess whether theta and delta TF measures index independent processes occurring during response inhibition, and 2) to identify whether theta and delta have unique contributions to the
