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Backfire Effect

Cognitive bias that causes people who encounter evidence which challenges their beliefs to reject that evidence, and to strengthen their support of their original stance.

Origin

Political scientists Brendan Nyhan and Jason Reifler coined the term in their 2010 paper "When Corrections Fail: The Persistence of Political Misperceptions" in Political Behavior, reporting that factual corrections sometimes increased rather than reduced belief in political misperceptions. The finding attracted wide attention, but subsequent studies — including follow-up work by Nyhan and Reifler themselves — largely failed to replicate the effect, and by the early 2020s most researchers considered large-scale backfire effects rare or nonexistent.

Updated February 22, 2026