Within Accuracy Nudge
The Best Moment to Slow a Viral Claim
Accuracy prompts are most useful when they appear just before a user shares, quote-posts, forwards, or otherwise expands a claim's reach.
On this page
- Why pre share timing matters
- Public reposts versus private forwarding
- What happens after a claim is already viral
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Introduction
Accuracy prompts work best in the narrow window immediately before a person shares, reposts, quote-posts, forwards, or otherwise amplifies a claim. The evidence behind these interventions suggests that timing is not a minor design detail but the central mechanism. A prompt shown after a post has already been shared may help with correction or reflection, but it cannot prevent the initial act of amplification. By contrast, a prompt that appears at the moment a user is about to spread a claim can redirect attention from social rewards, outrage, identity signalling, or urgency back to a simple question: “Is this actually true?” [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
Research on accuracy nudges consistently finds that making accuracy salient just before a sharing decision improves the quality of information people say they would share. The intervention is effective not because it teaches new facts in real time, but because it reaches users at the precise moment when accuracy is most likely to be overlooked. [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
Why Pre-Share Timing Matters
The strongest evidence for accuracy prompts comes from studies examining the gap between what people believe and what they choose to share. Researchers have repeatedly found that people are often better at judging whether information is true or false than their sharing behaviour would suggest. The problem is frequently one of attention rather than complete inability to distinguish truth from falsehood. [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
A reposting decision is a distinct psychological event. While reading a post, a user may focus on its plausibility. When deciding whether to share it, different considerations can take over:
- Will this get attention? [prosocialdesign.org]prosocialdesign.orgAccuracy PromptsBy calling their attention to accuracy, users will be more apt to discern if a news item is misinformation and less likel…
- Does it support my side?
- Is it emotionally powerful?
- Should people see this immediately?
These motivations can crowd out accuracy concerns. A prompt inserted directly before the sharing action interrupts that shift in attention and reintroduces truthfulness into the decision process. Studies in both survey environments and real-world social media settings have found that subtle reminders about accuracy improve the quality of subsequent sharing decisions. [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
This explains why the intervention is considered proactive rather than reactive. Instead of trying to limit damage after misinformation spreads, it seeks to stop some of that spread from occurring in the first place. [Nature]nature.comAccuracy prompts are a replicable and generalizable…by G Pennycook · 2022 · Cited by 364 — Overall, accuracy prompts increased t…
The Importance of the Final Click
From an implementation perspective, the moment just before a share button is activated is especially valuable because it is the last point at which a platform can introduce reflection without blocking expression.
Several experimental designs have exploited this principle. Some ask users to evaluate the accuracy of a headline before continuing. Others integrate accuracy language into sharing interfaces themselves. Researchers have even tested prompts embedded near sharing controls, finding that making accuracy salient at the point of action can reduce willingness to share false content while preserving engagement with legitimate information. [PMC]pmc.ncbi.nlm.nih.govPMC“I Think This News Is Accurate”: Endorsing Accuracyby V Capraro · 2022 · Cited by 59 — Accuracy prompts, nudges that make accuracy salient, typically decrease the sharing of fake news…
The timing matters because attention is limited. A reminder delivered minutes earlier may be forgotten. A reminder delivered after publication arrives too late to influence the decision that caused the spread.
Public Reposts Versus Private Forwarding
Not all amplification occurs in public feeds. A claim can spread through public reposts, private messages, group chats, email forwarding, or closed communities. The same timing logic applies across these contexts, but the stakes differ.
Public reposts can rapidly expose claims to large audiences. In these situations, a pre-share prompt may prevent a single action from triggering much wider circulation. Because social platforms often encourage rapid engagement, the moment before a public repost is particularly important. [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
Private forwarding presents a different challenge. Users often regard messages sent to friends or family as informal and trustworthy. As a result, they may feel less need to verify information before forwarding it. Yet misinformation frequently travels through private networks before reaching broader public attention.
For designers, this suggests that accuracy prompts should not be limited to highly visible public sharing tools. The same intervention may be useful before forwarding a message into a group chat, sending a viral image to multiple contacts, or reposting content into a private community. The key factor is not audience size but whether the action expands a claim’s reach.
When Users Are Most Receptive
The best moment is usually one in which a user has already expressed interest in sharing but has not yet committed. At this stage:
- The user is engaged with the content.
- The sharing decision is still reversible.
- Accuracy has not yet been displaced by momentum.
- No public commitment has been made.
Once a user has publicly endorsed a claim, psychological pressures such as consistency and reputation management can make reconsideration harder. A prompt shown beforehand avoids those complications and works with existing preferences for accuracy rather than against a public commitment. [Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
What Happens After a Claim Is Already Viral
The effectiveness of timing becomes clearer when considering the alternatives.
After misinformation has gone viral, platforms typically rely on corrections, warning labels, fact-checks, downranking, contextual information, or user reports. These approaches can be valuable, but they address a different stage of the information lifecycle. They respond after exposure and sharing have already occurred. [Nature]nature.comAccuracy prompts are a replicable and generalizable…by G Pennycook · 2022 · Cited by 364 — Overall, accuracy prompts increased t…
Once a false claim has accumulated millions of views, every corrective intervention faces a harder task. Some users may never see the correction. Others may remember the original claim more strongly than the later rebuttal. In network terms, the information has already travelled.
Accuracy prompts aim at a narrower but strategically important objective: reducing the number of sharing events that create those cascades in the first place. This is one reason researchers describe them as preventative interventions. Their value lies less in changing minds after widespread exposure and more in reducing the chance that questionable claims gain momentum. [Nature]nature.comAccuracy prompts are a replicable and generalizable…by G Pennycook · 2022 · Cited by 364 — Overall, accuracy prompts increased t…
The Limits of Late Intervention
This does not mean post-viral measures are useless. Corrections remain necessary because some misinformation will spread regardless of preventative efforts. However, evidence suggests that the greatest advantage of accuracy prompts comes from reaching users before amplification begins. Meta-analyses of accuracy-prompt experiments have found that these interventions improve sharing discernment primarily by reducing intentions to share false headlines, demonstrating the value of acting at the decision point rather than after dissemination. [Nature+2PMC]nature.comAccuracy prompts are a replicable and generalizable…by G Pennycook · 2022 · Cited by 364 — Overall, accuracy prompts increased t…
In practice, the lesson is straightforward: if the goal is to slow the spread of a viral claim, the most valuable moment is not after thousands of reposts, but in the few seconds before the next one. The closer an accuracy prompt is placed to the act of sharing, the greater its opportunity to prevent amplification rather than merely react to it. [Nature+2Nature]nature.comShifting attention to accuracy can reduce misinformation…by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh…
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Endnotes
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Source: nature.com
Link: https://www.nature.com/articles/s41586-021-03344-2Source snippet
Shifting attention to accuracy can reduce misinformation...by G Pennycook · 2021 · Cited by 1584 — The results show that subtly sh...
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Source: nature.com
Link: https://www.nature.com/articles/s41467-022-30073-5Source snippet
Accuracy prompts are a replicable and generalizable...by G Pennycook · 2022 · Cited by 364 — Overall, accuracy prompts increased t...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCNudging Social Media toward Accuracy
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9082967/Source snippet
Social Media toward Accuracy - PMC - NIHby G Pennycook · 2022 · Cited by 131 — We review research that shows how a simple nudge or prompt...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCAccuracy prompts are a replicable and generalizable
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9051116/Source snippet
by G Pennycook · 2022 · Cited by 360 — Online misinformation has become a major focus of attention in recent years among academics, te...
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Source: nature.com
Link: https://www.nature.com/articles/s41599-025-05233-9Source snippet
Can shifting attention to accuracy reduce misinformation on...by Z Liu · 2025 · Cited by 2 — The results showed that a subtle shift of a...
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Source: nature.com
Link: https://www.nature.com/articles/s41598-026-39555-8Source snippet
AI-supported real-time news evaluation reveals effects of...by S Yury · 2026 — In the literature, the concept of misinformation coexists...
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Source: nature.com
Link: https://www.nature.com/articles/s41562-025-02205-6Source snippet
Following news on social media boosts knowledge, belief...by S Altay · 2025 · Cited by 24 — These trends may exacerbate polarization, ra...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMC“I Think This News Is Accurate”: Endorsing Accuracy
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC10637098/Source snippet
by V Capraro · 2022 · Cited by 59 — Accuracy prompts, nudges that make accuracy salient, typically decrease the sharing of fake news...
Additional References
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Source: researchgate.net
Link: https://www.researchgate.net/publication/360253696_Accuracy_prompts_are_a_replicable_and_generalizable_approach_for_reducing_the_spread_of_misinformationSource snippet
Accuracy prompts are a replicable and generalizable...14 Apr 2022 — Accuracy prompts increased the quality of news that people share (sh...
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Source: mediawell.ssrc.org
Link: https://mediawell.ssrc.org/citations/accuracy-prompts-are-a-replicable-and-generalizable-approach-for-reducing-the-spread-of-misinformation-2/Source snippet
Accuracy prompts are a replicable and generalizable...Overall, accuracy prompts increased the quality of news that people share...
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Source: prosocialdesign.org
Link: https://www.prosocialdesign.org/library/accuracy-promptsSource snippet
Accuracy PromptsBy calling their attention to accuracy, users will be more apt to discern if a news item is misinformation and less likel...
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Source: merriam-webster.com
Link: https://www.merriam-webster.com/dictionary/accuracy -
Source: misinforeview.hks.harvard.edu
Title: developing an accuracy prompt toolkit to reduce covid 19 misinformation online
Link: https://misinforeview.hks.harvard.edu/article/developing-an-accuracy-prompt-toolkit-to-reduce-covid-19-misinformation-online/Source snippet
Misinformation ReviewDeveloping an accuracy-prompt toolkit to reduce COVID...by Z Epstein · 2021 · Cited by 139 — Recent research sugges...
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Source: chicagopolicyreview.org
Title: try accuracy prompts to reduce the spread of misinformation online
Link: https://chicagopolicyreview.org/2022/01/04/try-accuracy-prompts-to-reduce-the-spread-of-misinformation-online/Source snippet
Try Accuracy Prompts to Reduce the Spread of...4 Jan 2022 — These accuracy prompts were modest interventions that encouraged participant...
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Source: peasec.de
Link: https://www.peasec.de/paper/2025/2025_BiselliHartwigReuter_PersonalisedNudges_CSCW.pdfSource snippet
were designed as accuracy prompts [e.g., 27, 54, 84] or social norm nudges [41, 46...Read more...
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Source: news.cornell.edu
Title: accuracy nudges decrease misinformation sharing left right
Link: https://news.cornell.edu/stories/2024/04/accuracy-nudges-decrease-misinformation-sharing-left-rightSource snippet
'nudges' decrease misinformation-sharing on left, right4 Apr 2024 — They found that “nudges” regarding the importance of accuracy reduced...
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Source: semanticscholar.org
Link: https://www.semanticscholar.org/paper/Accuracy-prompts-are-a-replicable-and-generalizable-Pennycook-Rand/aa6c54ab0515105d0722a49f20b4997f65a2389bSource snippet
y of the accuracy prompt effect on sharing discernment, which is replicable and...
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Source: prosocialdesign.org
Link: https://www.prosocialdesign.org/citations/accuracy-prompts-are-a-replicable-and-generalizable-approach-for-reducing-the-spread-of-misinformationSource snippet
a promising approach for reducing misinformation sharing online.Read more...
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