Fig. 4: Brain–behavior relationships for the FLS score and the coefficient of variation (CoV) of the FLS score.

a Interregional directed functional brain connectivity from the RPFC to SMA as a significant (p = 0.01) predictor of the FLS score where RPFC to SMA functional connectivity is significantly (p < 0.05) affected by skill level (expert vs. novice). b The plot shows the partial regression of the interregional directed functional brain connectivity of the RPFC to SMA as a predictor of the FLS score. c CoV of the interregional directed functional brain connectivity from the RPMC to LPMC (p = 0.01) and LPMC to LPFC (p < 0.001) as significant predictors for the CoV of the FLS score. The CoV of the LPMC to RPMC functional connectivity was significantly (p < 0.05) affected by the interaction between the skill level and the simulation technology. d The plot shows the partial regression of the CoV of interregional directed functional brain connectivity from the RPMC to LPMC as a predictor of the CoV of the FLS score. e The plot shows the partial regression of the CoV of the interregional directed functional brain connectivity from the LPMC to LPFC as a predictor of the CoV of the FLS score.