  In this study, we conducted an online, between-subjects experiment (N =
2,049) to better understand the impact of warning label sources on information
trust and sharing intentions. Across four warners (the social media platform,
other social media users, Artificial Intelligence (AI), and fact checkers), we
found that all significantly decreased trust in false information relative to
control, but warnings from AI were modestly more effective. All warners
significantly decreased the sharing intentions of false information, except
warnings from other social media users. AI was again the most effective. These
results were moderated by prior trust in media and the information itself. Most
noteworthy, we found that warning labels from AI were significantly more
effective than all other warning labels for participants who reported a low
trust in news organizations, while warnings from AI were no more effective than
any other warning label for participants who reported a high trust in news
organizations.
