Relation between ISFC and individual differences in value learning
Lastly, we asked whether inter-individual differences in the constraints of activity and functional connectivity could explain inter-individual differences in learning. We observed that average task accuracy increased across the four days of task practice (Fig. 6A; Two-way ANOVA: \(F(3,80)=3.69,\ p=0.0169\)). Next, we computed
the Spearman correlation coefficient between each participant's task accuracy and the ISFC for each day. There were significant correlations between the whole brain ISFC and accuracy for day 3 ( r =0.6227, p=0.0034) and day 4 (r=0.4486,p=0.0473). Given this whole-brain effect, we next performed post-hoc analyses to determine which specific network module might be driving the relation between ISFC and task accuracy. We observed no significant correlation between each module ISFC and the accuracy for the first two days. However most of the modules were significantly correlated with the accuracy in day 3 including FT(r=0.4983 p=0.0253), SM(0.5722,p=0.0084), DMN(r=0.5202,p=0.0187), VIS(r=0.5827,p=0.007) and PCT (r=0.6242,p=0.0030). Only the PCT module was significantly correlated with the ISFC in day 4 as as shown in Figure 6B (r=0.4636, p=0.0394).