These PC values representing average phase coherence were analyzed statistically using a three-way repeated measures ANOVA (Condition×Antero-Posterior×Time Interval), which revealed a significant main effect of all factors and also significant interactions between all these factors for both delta and theta frequency bands, except main effect TI at the theta frequency (see Table 1 for details). A follow-up ANOVA with two levels of the factor Condition (Go vs. NoGo) revealed significant main effects of all factors and also significant interactions between all these factors for delta frequency band; in the case of theta frequency, there were only a significant main effect Antero-Posterior and significant interactions Condition by Antero-Posterior, Antero-Posterior by Time Interval, and Condition by Antero-Posterior by Time Interval (for details see Table 2). Thus, statistical analyses showed that task differences in average PC were most prominent at the delta frequency and were higher in the NoGo task condition as compared with Go condition, especially at frontal and central sites and especially in the second time interval after stimulus onset (for details see Table 2). In the case of the theta
