The phase difference lock index (PDLI) for the electrode pair FZ and PZ, for the infrequent (target) tone for human adults and periadolescents is shown in Figure 6a. Repeated measures ANOVA revealed that periadolescents had significantly lower PDLI levels than adults to the infrequent (target) tone in the delta (F=26.4, df=1,56, p<0.001), theta (F=41.2, df=1,56, p<0.001) alpha (F=13.3, df=1,56, p=0.001) and beta (F=9.4, df=1,56, p=0.003) frequency ranges, as seen in Table 5.
