and Cavanagh, 2011). Using a recently developed approach based on principal components analysis (PCA) of reduced interference distributions (RID) from Cohen's class of TF transforms (Bernat et al., 2005), recent work has provided improved TF specificity for indexing theta and delta contributions to P3 (Bernat et al., 2011; Bernat et al., 2007; Gilmore et al., 2010), ERN (Bernat et al., 2005; Hall et al., 2007), and most recently the feedback negativity (FN; Bernat et al., 2011; Nelson et al., 2011; Bernat et al., 2012). This recent work with the FN was notable in indexing highly overlapping theta and delta activations, supporting the idea that they index functionally distinct processes, and providing a clear model of how the theta and delta phase dynamics and amplitude combine in an ordered way to produce activity generally measured in traditional time-domain components. The current study focuses on response inhibition ERPs recorded during a go/no-go task. The first goal was to assess for separable theta and delta processes underlying the N2-P3 in response inhibition. The second goal was to assess whether the phase and amplitude dynamics observed to underlie the FN would occur similarly in the go/no-go task, suggesting that these dynamics may be an
