Table 1. Structural characteristics of the five partisan communities.

Partisan communities show distinct structural characteristics—e.g. the number of users N_u, number of edges N_e, mean degree 〈k〉 and normalized mean degree 〈k〉_N—but exhibit a rather similar communicative behavior in terms of the polarization index ρ_α and the self-reference indexes for retweeting (μ_r) and mentioning (μ_m).

Partisan community	N u	N e	〈k〉	〈k〉N	〈ρα〉	μ r	μ m
DX	70061	2075013	59.2	4⋅10−4	0.95	0.93	0.52
CSX	112459	1080271	19.2	9⋅10−4	0.95	0.9	0.47
M5S	6313	107100	33.9	7⋅10−3	0.84	0.73	0.39
FI	598	3133	10.5	1⋅10−2	0.89	0.77	0.34
MINGOs	24994	65388	5.2	6⋅10−4	0.93	0.78	0.47