Quark's

There's some real interesting stuff in here.

It doesn’t take much to destabilize or stabilize the system, Törnberg found. Even if the threshold for disagreement was quite low, the disagreements became amplified to the point where each random interaction was increasingly likely to exceed those thresholds. More and more users were pushed to relocate until what was once a community with a solid diversity of opinion rapidly became polarized and/or overly homogenous.

Conversely, if just 10 percent of users in a given social media community largely agree with your stances, you will be more tolerant toward diverse opinions that contradict your own. “There’s a certain chance that some users will end up in communities where it’s very homogenous and 99 percent of users are disagreeing with them,” said Törnberg. “That will cause them to leave, and you get this feedback effect just because of the structure of interaction. But if you have a filter bubble effect, where everyone is shown 10 percent of their own type, that creates a possibility for you to find the people who you agree with within the community. And that stabilizes the entire dynamics so it doesn’t tip over to one side or the other and become extreme or overly homogenous.”

Törnberg found some confirmation of those dynamics when he analyzed an actual online echo chamber: the subreddit r/MensRights. He found that members of the subreddit were more likely to leave if their posts diverged too far, linguistically, from the community’s center of gravity.

“Who are the users leaving the community?” said Törnberg. “The users that are more ideologically distant are more likely to leave. So it captures the same mechanism of feedback dynamics, where the community becomes more homogenous and more extreme because users leave—[and they leave] because they feel it’s becoming too homogenous and extreme. Eventually it tips over to one direction. And of course, as the community becomes more extreme, there’s this boiling the frog effect where the users who stay are influenced by the community and become more extreme.”