Fig. 1. Comparison of Partial correlations for top features for both states.

Partial correlations for “ON” and “OFF” states were calculated using the top five features of the picture description task, as listed in Table 1. Positive correlations are displayed in red while negative correlations are in blue. “OFF” state shows a stronger correlation among these five features in comparison with “ON” state. Notes: Sub-index in the name of the feature indicate the statistical descriptor: a robust minimum (computed as 10th percentile), b robust maximum (computed as 90th percentile), c mode (the most frequent value), d skewness (a measure of asymmetry in the distribution of values).