Correlation between 2PD change (left column, stimulated right IF; right column, control left IF) and alpha band ERD during RSS. A, Top row, Scalp distribution of Pearson's correlation coefficients R and corresponding p-values. Black dots, Channels within significant cluster (pclust < 0.0025). Gray diamond, Channel FC3 with maximum correlation to learning rate (for right IF)/corresponding contralateral channel FC4 (for left IF). B, Scatter plot of single subject values at channels FC3/FC4. Successful learners in green (n = 20), other subjects in red for illustration purposes—no categorization/collapsing was done for correlation analysis.