Fig. 4.

(a) The dependence among global efficiency values for three types of stimuli [neutral (N), congruent (C), and incongruent (IC)] and percentage of strongest connections in the network ($K_{\text{cost}}$). The solid lines correspond to real network, and the dashed lines correspond to random networks. (b) The ratios of global efficiency ($\mathrm{GE}/{\mathrm{GE}}_{\text{random}}$) between the real brain functional networks and 100 degree matched random networks to assess small-worldliness of brain functional networks. The purple triangles indicate that there are significant differences among the GE of three types of stimuli ($p<0.05$).