Fig. 2

Mean posterior correlation (y-axis) against the 100 equal length time divisions (x-axis) of the right eye at the two flash strengths of 0.6 (2 A-D) and 1.2 log phot cd.s.m^− 2 (2E-H) for the Control and ADHD groups. Row 29 (A, E) is at the beginning of the time division beginning at (t = 11.9 msec), for the a-wave with a similar pattern of correlation across the 100-time divisions which was also observed for rows 37 (B, F) at the time interval beginning at t = 29.6 msec for the b-wave. In contrast for row 56 at time division beginning at 71.7 msec and corresponding to the Photopic Negative Response (PhNR), there was less correlation with the preceding time divisions in the ADHD group as indicated by the red boxed areas in Fig. 2C and G. This pattern of a reduced time division correlations in ADHD was more prominent at row 80 at time division beginning at 124.9 msec and is indicated by the purple box in 2D for the 0.6 log phot cd.s.m^− 2 strength. See Additional file 1 for left eye exemplars