Fig. 2

Boxplots showing group differences in the trial-to-trial variability measures based on t-tests: (A) P200 non-target (standard) neural responses; (B) P200 target(oddball) neural responses; (C) P300 non-target (standard) neural responses; (D) P300 target (oddball) neural responses; The dotted black horizontal line is the overall mean and the red triangles are the group means; Significance levels are denoted as follows: *** for p < 0.001, ** for p < 0.01, * for p ≤ 0.05, and ns for not significant; Detailed statistical values can be found in Table S2 of the supplementary material