Figure 3. Hyper-brain network properties under the three kissing conditions.

A: Changes in hyper-brain network costs dependent on the coupling threshold. B: Changes in global efficiency (E_glob) in the hyper-brain, regular (lattice), and random networks dependent on the coupling threshold. C: Changes in local efficiency (E_loc) in the hyper-brain, regular (lattice), and random networks dependent on the coupling threshold. D: Changes in characteristic path length (CPL) in the hyper-brain and random networks dependent on the coupling threshold. The CPL of regular networks was always equal infinity and is, therefore, not presented in the diagram. E: Changes in the clustering coefficient (CC) in the hyper-brain, regular (lattice), and random networks dependent on the coupling threshold. F: Changes in the small-worldness coefficient (σ) in the hyper-brain network dependent on the coupling threshold. G: Changes in the small-worldness coefficient (ω) in the hyper-brain network dependent on the coupling threshold. RK = romantic kissing, K-SA = kissing while performing silent arithmetic, and HK = hand kissing. Hyper-brain network: red line; regular network: blue line; and random network: green line.