Hostility for people in opposing political parties in the U.S. has been increasing for decades. Research in political science is at the frontier of more detailed measures of polarization that show what drives those feelings. This research provides insight on what might change the course of the nation.

A multidisciplinary research team in communication and computer science performed a systematic audit of YouTube’s video recommendations in 2021 and 2022 to test how a person’s ideological leaning might affect what videos YouTube’s algorithms recommend to them.