To further reveal the interrelationship between N400, P600, and behavioral scores, we first performed a correlation analysis, which revealed a highly significant positive correlation between the change in N400 and the change in P600 ( r = .769, p < .0001).
There were increases by a significant 1.025 μV from the first to the third round of learning ( p = .043), a significant 1.147 μV from the first to the fourth ( p = .008), a significant 1.055 μV from the second to the fourth ( p = .013), and a marginally significant .933 μV from the second to the third ( p = .073) (as it can be seen in Figure 5 ).