(Color online) The average degree 〈kU〉, scaling exponent 〈η〉, reputation 〈μ〉 of two divided user groups with different parameter q for (a,c,e) MovieLens and (b,d,f) Netflix data sets, in which the parameter θ is set to 0.3 and 0.6, respectively.

One can find that the average 〈ku〉, 〈η〉 and 〈μ〉 of high perceptibility users are larger than those of the other users with different parameter q for two empirical data sets, which indicates that high perceptibility users show different collective behavior patterns than the other users: Larger activity, stronger correlation of rating series and higher reputation.