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A web-based experiment (n = 960) examined how debunking of publicly shared news on social media affects viewers' attitudes toward the source who shared the fake news, their agreement with the news position, and perceived credibility of social media as a news platform. Exposure to debunking information did not lower participants' agreement with the news position, but led them to derogate (1) the source who shared the misinformation and (2) social media as a news platform. However, participants who initially favored the source were less likely to attribute the sharing of fake news to the source's dispositions, rather than situational factors, thereby maintaining their positive attitudes toward the source.
Jang et al. (Tue,) studied this question.