Spearman rank order correlations were performed for both grand average and go minus no-go difference to examine the relationship between TF theta and delta. For the grand averages, theta and delta evidenced a moderate correlation (Spearman's rho (64) = .40, p < .001), suggesting that while delta and theta shared a moderate amount of variance, they did not simply index the same underlying process. The correlation between theta and delta no-go minus go difference scores was also moderate (Spearman's rho (64)= .27, p = .029), similarly suggesting separable processes.
