Continued Influence Effect
🇳🇴Vedvarende påvirkningseffektDefinition
The continued influence effect is that misinformation keeps influencing thinking and decisions even after it has been clearly corrected. You can know something is false and still use it as a premise.
Real-world example
Johnson and Seifert (1994) had participants read a news report about a fire – half later received a clear correction stating the cause they'd initially been told (flammable material in a closet) was wrong. Even after the correction, participants still referenced the flammable material when explaining what happened.
The effect explains why conspiracy theories and rumors survive even thorough rebuttals. Wakefield's retracted 1998 autism-vaccine study may be the clearest example: every major health authority has corrected it for decades, but the reference still surfaces in vaccine debates. A single retraction rarely erases a narrative that has already taken hold.
Supplementary perspective
The mechanism is that the brain builds a coherent causal story. Removing a piece without offering a replacement leaves a hole – and the brain prefers a flawed story to none. Effective corrections must therefore provide an alternative explanation, not just say 'it wasn't true.'
Practical advice
Recognize
- —Notice if you still cite a 'fact' you've learned is wrong.
- —Check if you react emotionally to a claim even after it's been retracted.
- —Watch when discussions circle back to claims everyone knows have been debunked.
Counteract
- —When correcting something – offer an alternative explanation, not just a denial.
- —Repeat the correction multiple times and in different contexts; once is not enough.
- —Recheck sources before repeating 'something I read somewhere' – especially when it's dramatic.
Ethical use
- —In journalism: be cautious about repeating misinformation even to refute it – repetition entrenches it.
- —In leadership: when rumors turn out to be wrong, explain what actually happened, not just that the rumor is false.
- —In communication: write so the reader remembers the correct information, not just that there's a debate.