To test this possibility, Bail set up a clever experiment. He recruited more than 1,500 Twitter users and had them low accounts that exposed them to opposing viewpoints. For a month they saw messages and information from elected officials, organizations, and opinion leaders from the other side. A liberal might see tweets from Fox News or Donald Trump. A conservative might see posts from Hillary Clinton or Planned Parenthood.
It was a digital version of reaching across the aisle. A simple intervention that could have big effects for social policy.
Then, at the end of the month, Bail and his team measured users’ attitudes. How they felt about various political and social issues. Things like whether government regulation is beneficial, whether homosexuality should be accepted by society, and whether the best way to ensure peace is through military strength.
It was a huge undertaking. Years of preparation and thousands of hours of work. The hope was that, as thousands of pundits, columnists, and other talking heads have argued, connecting with the other side would bring people closer together.
But that’s not what happened. Exposure to the other side didn’t make people more moderate.
In fact, just the opposite. Exposure to opposing views did change minds, but in the opposite direction. Rather than becoming more liberal, Republicans exposed to liberal information became more conservative, developing more extreme attitudes toward social policies. Liberals showed similar effects.
Excerpt from: Catalyst by Jonah Berger