A large sub-network showed a positive association between FC and years of formal education using primary thresholds of p < 0.01, p < 0.005 and p < 0.001. A focal sub-network displayed a negative association with years of education using a primary threshold of p < 0.005 and p < 0.001 (a). In the network that evidenced a positive association with FC, less educated subjects presented moderately low positive FC values while more educated subjects presented moderately high positive FC values (b). In the network with a negative association with years of formal education, mean FC ranges from low positive FC values to moderate negative mean FC values from individual with lower years of formal education to individuals with higher number of years of formal education (b). In the top panel (a) black dots represent AAL brain regions and blue and red edges denote edges with negative and positive associations with years of education, respectively. Bottom panel (b) presents scatter plots of the mean FC of the statistically significant networks in function of years of education.