Marta Serra-Garcia, UCSD
ABSTRACT: This paper investigates mistakes and overconfidence in detecting lies in the context of news events. Participants in our experiments fail to detect lies but are overconfident about their ability to do so—both in absolute and relative terms. We use these findings to test the effect of sharing on lie detection. We find that even when incentivized to share true news, participants are more likely to share lies. Moreover, the receiver is more likely to believe shared videos. Combined, the tendency to believe lies increases with sharing
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