On social media, encountering opposing views can make people become even more wedded to their own... Jack Dorsey, repeatedly denied that Twitter’s algorithms are biased against conservative voices. His denials echoed recent statements he has made about the importance of exposing people to opposing political views. Indeed, he announced last month that Twitter was experimenting with new features that would actively expose people to such views.Mr. Dorsey’s goal of reducing political polarization is commendable. But his proposed solution — disrupting our social media “echo chambers” — may actually make things worse. Forcing Twitter users to encounter political views they disagree with, my research shows, can make them become even more wedded to their own... Scholars were once optimistic that social media could increase bipartisan dialogue by allowing virtually anyone to engage in public debate about politics. Yet mounting evidence suggests that Facebook and Twitter have allowed Republicans and Democrats to further segregate themselves... Then we paid half of them to follow for one month a bot we created that retweeted messages from elected officials and other opinion leaders from the other political party... Instead of reducing political polarization, being exposed to opposing ideas increased it. Republicans who followed a Democratic bot for one month expressed social policy views that were substantially more conservative at the conclusion of the study... Why did some social media users’ political views become more entrenched after we disrupted their echo chambers? One possibility is the structure of Twitter itself. Social psychologists have long argued that positive, intimate contact between members of rival groups across an extended period can produce compromise. But that is not what Twitter offers. Its character limits — combined with the anonymous, spontaneous nature of so many exchanges on the platform — simply may not be conducive to mutual understanding... a first step should be for Twitter to experiment with removing its character limits. Allowing people to voice their opinions in detail will not improve the civility of discourse by itself, but it may facilitate a better competition of ideas and increase the possibility for Democrats and Republicans to understand one another... Twitter should not force its users to view messages from a political party they oppose. Instead, it should create an alert system that makes people aware when they are being exposed predominantly to one point of view. The most pernicious effect of social media echo chambers may be that most people are unaware of how much their political views are influenced by selective exposure to information.
Finally, if Twitter is resolved to expose users to opposing political views, it should focus on doing so with specific issues. Republican and Democratic Twitter users appear unready to have broad conversations about politics. But breaking up the echo chambers that prevent cross-party discussion about market-based solutions to climate change, for example, might be more successful.