I started to read the article but I only got as far as this. Then I stopped reading. Was that wrong?
“At the scale of a group, repeated local influences among group members may give rise to complex patterns of opinion dynamics such as consensus formation, polarization, or fragmentation [8]–[11]. For example, it has been shown that people sharing similar extreme opinions, such as racial prejudices, tend to strengthen their judgment and confidence after interacting with one another [12]. Similar mechanisms of opinion dynamics can take place in a variety of social contexts.”
“At the scale of a group, repeated local influences among group members may give rise to complex patterns of opinion dynamics such as consensus formation, polarization, or fragmentation [8]–[11]. For example, it has been shown that people sharing similar extreme opinions, such as racial prejudices, tend to strengthen their judgment and confidence after interacting with one another [12]. Similar mechanisms of opinion dynamics can take place in a variety of social contexts.”