(Color online) The average degree 〈k_U〉, 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 〈k_u〉, 〈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.