Figure 6

Explanation capacity of the simulation model. The results of fits by the simulation model to the regression lines of all data sets (that is, green and dashed lines in Fig. 3). Very good fits were observed between the simulation results (orange triangles) and the regression lines (green lines); that is, the simulation model displayed explanation capacity for the phenomenon a>1 for C=Nm^a, with a monotonically increasing cost function (α>0). The parameters of the cost functions were α=1.34 and β=0.24 (a: Twitter), α=1.27 and β=0.39 (b: 755 group chat), α=3.89 and β=0.23 (c: 755 wall communication), α=1.62 and β=0.64 (d: Ameba Pigg), α=0.05 and β=0.31 (e: mobile phone) and α=5.05 and β=0.34 (f: SMS).