Posterior density plots showing the correlation between drift rate and the EEG measure. Inset, Schematic representation of the drift rate parameter (v; left) and EEG measure (slope of response-locked waveform from −200 to 0 ms around the response; right) that were correlated in the joint model, where ρ represents the correlation. Posterior density plots in the left column reflect the correlation between the mean drift rate across difficulty levels (v.mean) and the mean EEG slope measure across difficulty levels (EEG.mean). Posterior density plots in the right column reflect the correlation between the difference in drift rate between difficulty levels (v.diff) and the difference in EEG slope measure between difficulty levels (EEG.diff). Top row, Plots for the motion coherence task. Bottom row, Plots for the direction integration task. Orange distribution represents the correlation across all participants. Gray and blue distributions represent separate correlations estimated for typical children and children with dyslexia, respectively.