Political Scientist Challenges Concerns About Misinformation on Social Media

Political Scientist Challenges Common Misconceptions About Misinformation

Widespread assumptions about misinformation and its effects on public opinion were called into question Wednesday by Dartmouth College professor Brendan Nyhan during an event at George Washington University’s School of Media and Public Affairs.

Nyhan, who received the 2026 Robert M. Entman Award in Democracy and Political Communication, argued that the impact of misinformation is often exaggerated in public discourse, with research showing its effects on political behavior are more limited and concentrated than commonly believed.

“The problem is not that people simply lack information,” Nyhan explained. “But they firmly hold the wrong information.”

The political scientist defined misinformation broadly as “false or unsupported” claims, emphasizing that the critical issue in evaluating public understanding is whether people actually believe these claims. Researchers rely on expert consensus and credible evidence from government agencies and scientific bodies to determine what constitutes misinformation, while acknowledging that knowledge evolves and experts can make mistakes.

One key misconception Nyhan addressed is the prevalence of ideological echo chambers. Contrary to popular belief, data shows most Americans consume information from sources across the political spectrum. While partisan media diets exist, they are concentrated among a relatively small group of highly engaged individuals.

“Actually, highly slanted information diets are quite rare, the kinds of the stylized model of the echo chamber is really an aberration,” Nyhan said. “Most people’s information diets don’t look like that.”

This misconception persists partly because the most politically engaged individuals, who tend to have the strongest views, consume the most news and dominate public conversations. Their behavior can make polarization appear more widespread than it actually is across the broader population.

Similar misunderstandings apply to the spread of false and extreme content online. Research using digital behavior data reveals that while some Americans encounter untrustworthy sources, these sources comprise only a small portion of overall news consumption. In one study examining extreme video content consumption, Nyhan found that just 1.7 percent of users were responsible for 80 percent of time spent on alternative video channels.

“Very small percentages of folks are responsible for the vast majority of the exposure that we see,” he noted.

Nyhan also challenged claims that social media is a primary driver of political polarization, pointing out that such assertions often rely on assumptions rather than strong causal evidence. Studies attempting to isolate the effects of platforms like Facebook show little to no impact on users’ political attitudes when they reduce their exposure to content on these platforms.

“We simply don’t have as much evidence as you might intuit about the harms of social media in terms of political polarization,” Nyhan said.

He suggested people frequently attribute broader political dysfunction to social media because that’s where they encounter visible examples of conflict and misinformation, leading to an overstatement of these platforms’ role in causing such problems.

Regarding fact-checking, Nyhan noted that early research, including his own, suggested corrective information could sometimes backfire. However, subsequent studies have largely failed to replicate that effect, with evidence now showing that fact-checking generally improves people’s accuracy in the short term.

“It turns out that what we find instead is that when we expose people to the correct information, their beliefs tend to become a little more accurate,” he explained.

The more significant challenge, according to Nyhan, is that improvements in belief accuracy rarely last, as people tend to revert to their original beliefs over time. Even repeated or more intensive efforts to provide accurate information have produced only modest and temporary effects.

“The puzzle, the dilemma is, how we make those effects last,” Nyhan said.

While acknowledging that misinformation remains a serious concern, Nyhan cautioned against overstating its reach or effects, which can lead to misguided conclusions. He emphasized the need for more evidence, particularly outside the United States and Western Europe, to fully understand how misinformation operates in different contexts.

“This isn’t the end, this is the starting point,” Nyhan concluded. “And it will be a real mistake to just think the problem is settled and we can stop paying attention.”