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This study found that while participants rated their own Facebook friend as more credible and more similar to them than a news organization, they rated news articles as more credible when they are shared on Facebook by a news organization than when they are shared by their own Facebook friend. Source, however, interacts with motivation. News articles shared by a news organization are rated more credible only when motivation is high. There were no significant differences between sources when motivation is low.
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Edson C. Tandoc (2018) studied this question.
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