An evaluation of PLI values in the human participants using MANOVA revealed a main effect of group (periadolescents vs. adults: F=88.1, df=1,330, p<0.001), and a main effect of tone (frequent vs. infrequent (target): F=364.6, df=1,330, p<0.001) and of electrode location (10.6, df=2,330, p<0.001). The infrequent (target) tone had a significantly higher grand mean PLI value (0.55 ± .007) than the frequent tone (0.37 ± .007). Grand means also revealed that periadolescents had significantly lower PLI values (0.41) than adults (0.5). ANOVA identified that for the frequently presented tone that periadolescents had significantly lower PLI than adults for delta and theta activity for all electrode locations (F values range= 8.6-42.8).
