When False Claims Are Repeated, We Start To Believe They Are True

https://digest.bps.org.uk/2019/09/12/when-false-claims-are-repeated-we-start-to-believe-they-are-true-heres-how-behaving-like-a-fact-checker-can-help/

September 12, 2019

This phenomenon, known as the “illusory truth effect”, is exploited by politicians and advertisers — and if you think you are immune to it, you’re probably wrong. In fact, earlier this year we reported on a study that found people are prone to the effect regardless of their particular cognitive profile.

A study in Cognition has found that using our own knowledge to fact-check a false claim can prevent us from believing it is true when it is later repeated. But we might need a bit of a nudge to get there.

The researchers found that participants who had focussed on how interesting the statements were in the first part of the study showed the illusory truth effect

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