Politics and illusory truth: the impact of repetition on the citizenry | Perla Sosa

Repetition is not proof: how insistence—in politics and on social media—manufactures certainty, and why the best defense is a citizenry that checks the facts.

There is a phenomenon widely studied in cognitive psychology, known as the illusory truth effect, which describes people’s tendency to find claims more credible the more often they hear them. The reason is not that the information has been verified, but that familiarity creates a sense of confidence. When an idea becomes familiar, the brain processes it more easily and may mistakenly interpret it as true.

In politics, this mechanism takes on enormous importance. Governments, parties and political actors tend to constantly repeat certain narratives, slogans or accusations in order to instill a perception in public opinion. Over time, repetition can lead broad sectors of the population to accept a claim, even when it lacks sufficient evidence or has been debunked by reliable sources.

Social media have amplified this phenomenon to an unprecedented degree. A political message can be replicated thousands of times by supporters, influencers, sympathetic media outlets and automated accounts, creating the impression that a widespread consensus exists. Citizens are exposed to the same idea through multiple channels, which strengthens the sense of familiarity and increases the likelihood that it will be regarded as true.

The consequences for democratic life are profound, because when repetition outweighs facts, public debate is impoverished and citizens’ decisions may rest on distorted perceptions of reality. This fosters polarization and makes it harder to reach agreement on shared problems that require evidence-based solutions.

The best defense against illusory truth is a critical, informed citizenry. In an age when information circulates at high speed, hearing a claim many times is not enough to assume it is true. Democratic responsibility demands that we verify, cross-check sources and question even those messages that align with our own beliefs. The democratic health of a society depends, in large part, on its ability to distinguish between what is repeated and what is actually true.

References

Influencia: la psicología de la persuasión. Cialdini, R. B. (2016). Barcelona: Debolsillo.

Psicología social. Myers, D. G. (2017). México: McGraw-Hill Education.

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