Figure 5.

Users not only tend to be very polarized, but they also tend to be linked to users with similar preferences. Fraction of neighbors as a function of the engagement $\psi$. For a polarized science supporter u, the fraction of friends v with likewise polarization significantly grows with the engagement $\psi$ from $\gtrsim$0.30 to $\gtrsim$0.66. For a polarized conspiracy supporter u, the fraction of friends v with likewise polarization is very high ($\gtrsim$0.62) and grows with the engagement $\psi$ up to $\gtrsim$0.87 for the most engaged users. A user is labelled as “Not polarized” if she liked the same number of posts from Science pages and Conspiracy pages, respectively. A user is labelled as “Not engaged” if she has no liking activity on the pages of our dataset.