Key Takeaways
Misinformation
Misinformation refers to false or inaccurate information that spreads regardless of whether the person sharing it intends to deceive. It differs from disinformation, which involves deliberate deception. Misinformation can range from exaggerated health claims to distorted news headlines, and its effects can persist even after a correction is issued.
Researchers distinguish between misinformation (unintentional inaccuracy), disinformation (deliberate falsehood), and malinformation (accurate information shared to cause harm) — though in everyday use, the terms often overlap.
Why False Claims Travel So Fast
In 2018, a team at MIT published a landmark study in the journal Science analyzing the spread of verified true and false news stories on Twitter over more than a decade. Their finding was striking: false news was 70% more likely to be retweeted than true news, and it reached people six times faster. The researchers attributed this not primarily to bots, but to human behavior.
The key driver appears to be novelty. False claims — by their nature unconstrained by what actually happened — tend to be more surprising, emotionally provocative, and attention-grabbing than accurate accounts. Information that triggers strong emotions like fear, outrage, or disgust is more likely to be shared quickly, before any scrutiny takes place. Platform recommendation systems amplify this effect by surfacing content that generates high engagement, regardless of its accuracy.
70%
More likely: false news vs. true news retweeted
According to a 2018 MIT study published in the journal Science analyzing over a decade of Twitter data.
6x
Faster: speed of false news spread online
The same MIT study found false news reached users six times faster than accurate stories, driven primarily by human sharing behavior.
~20%
Reduction in misinformation sharing with accuracy nudges
Research by Pennycook and Rand found that prompting users to consider accuracy before sharing reduced false news sharing by roughly 20%.
The Brain's Role: Shortcuts That Backfire
Cognitive scientists point to several mental mechanisms that make misinformation sticky. One of the most studied is the illusory truth effect: when people encounter a claim multiple times, it begins to feel familiar, and familiarity is processed by the brain as a proxy for truth. This means that even false claims, when repeated often enough, gain an unearned sense of credibility.
Another factor is motivated reasoning — the tendency for people to evaluate evidence in ways that protect existing beliefs or group identities. When a false claim aligns with what someone already believes or wants to be true, the bar for accepting it drops significantly. Challenging such beliefs can feel like a personal or social threat, triggering defensive rather than analytical thinking.
These are not signs of low intelligence. Research consistently shows that susceptibility to misinformation is more closely tied to thinking style and emotional investment than to education level or general cognitive ability.
“The problem of fake news isn't about lying politicians or a lying press. It's about our own cognitive vulnerabilities — the shortcuts our minds take that make us easy targets for manipulation.”
— Gordon Pennycook, Cognitive psychologist and misinformation researcher, University of Regina
Why Corrections Often Fall Short
Debunking false claims is harder than it sounds. Studies in cognitive psychology show that when people encounter a correction, they don't simply swap out the false belief for the true one. The original claim leaves a trace — sometimes called a continued influence effect — that can persist even when a person consciously accepts the correction.
This has significant implications for how media organizations handle errors. A retraction published days after a viral story reaches a fraction of the original audience. Distorted science reporting compounds this problem: initial dramatic headlines often circulate widely while quieter follow-ups do not.
Researchers have found that corrections are more effective when they fill the explanatory gap left by removing a false belief — offering a clear alternative account rather than simply saying something is wrong. Emotional inoculation techniques, sometimes called "prebunking," show promise by warning people about manipulation tactics before they encounter misinformation.
Understanding these dynamics matters beyond academic interest. Areas of strong scientific consensus — from vaccine safety to climate change — have been persistently undermined by misinformation that corrections alone have failed to dislodge. And as patterns in political news consumption show, the same cognitive traps shape how people interpret facts across high-stakes domains.
This article provides general information about research on misinformation and cognitive science. It does not constitute professional, medical, or legal advice.