The DOI matches its Crossref record; 38 of the 41 references it cites were found in a registry or an index, and 3 are not checked yet.
Fighting COVID-19 Misinformation on Social Media: Experimental Evidence for a Scalable Accuracy-Nudge Intervention
Open accessAbstract
Across two studies with more than 1,700 U.S. adults recruited online, we present evidence that people share false claims about COVID-19 partly because they simply fail to think sufficiently about whether or not the content is accurate when deciding what to share. In Study 1, participants were far worse at discerning between true and false content when deciding what they would share on social media relative to when they were asked directly about accuracy. Furthermore, greater cognitive reflection and science knowledge were associated with stronger discernment. In Study 2, we found that a simple accuracy reminder at the beginning of the study (i.e., judging the accuracy of a non-COVID-19-related headline) nearly tripled the level of truth discernment in participants’ subsequent sharing intentions. Our results, which mirror those found previously for political fake news, suggest that nudging people to think about accuracy is a simple way to improve choices about what to share on social media.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Figures



Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The source backs part of the claim, not all of it — or backs it for a different population, condition or comparison.
In the citing paper
“Under these current plausible COVID-19 vaccine acceptance rates, possible levels of existing protective immunity-though it is unclear whether post-infection immunity confers long-term immunity 29 and the rapidly evolving nature of misinformation surrounding the pandemic 23,30 , it is unclear whether vaccination will reach the levels required for herd immunity.”
From Measuring the impact of COVID-19 vaccine misinformation on vaccination intent in the UK and USA (2021) · cites this paper as [23]
Experimental — accuracy not yet measuredThe cited source says what the claim attributes to it.
In the citing paper
“Experimental work indicates that directing users' attention to accuracy can improve sharing quality and reduce misinformation circulation (Pennycook et al., 2020(Pennycook et al., , 2021;;Roozenbeek et al., 2021).”
From Sensational Headlines, Engagement, and Credibility in Nepal’s Online News (2025) · cites this paper as Pennycook et al., 2020
The cited source says what the claim attributes to it.
In the citing paper
“Pennycook et al. (2020) and Roozenbeek et al. (2021) show that accuracy prompts can modestly improve users' sharing decisions, while Pennycook et al. (2021) argue that shifting attention toward accuracy can reduce misinformation sharing online.”
From Sensational Headlines, Engagement, and Credibility in Nepal’s Online News (2025) · cites this paper as Pennycook et al. (2020)
The check wasn’t confident either way, so it gives no verdict — never disputed.
In the citing paper
“Consistent with this view, a growing number of empirical studies have uncovered evidence that people update their political attitudes and beliefs in line with evidence (e.g., refs. 4,13,27–29) and arguments23,30,31 presented to them.”
From Factual knowledge can reduce attitude polarization (2025) · cites this paper as [28]
Experimental — accuracy not yet measured
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The case for motivated reasoning.
Kunda, Z. (1990) · Psychological Bulletin · doi:10.1037/0033-2909.108.3.480 · Cited by 9,022 · cited 1×
“A great deal of evidence suggests that people are motivated to seek out, believe, and share politically congenial information (Kahan, Peters, Dawson, & Slovic, 2017; Kunda, 1990; Lee, Shin, & Hong, 2018; Mercier & Sperber, 2011; Shin & Thorson, 2017).”
BackgroundCognitive Reflection and Decision Making
Frederick, S. (2005) · Journal of Economic Perspectives · doi:10.1257/089533005775196732 · Cited by 5,256
Lazer, D. M. J., Baum, M. A., Benkler, Y., Berinsky, A. J., Greenhill, K. M., Menczer, F., Metzger, M. J., Nyhan, B., Pennycook, G., Rothschild, D., et al. (2018) · Science · doi:10.1126/science.aao2998 · Cited by 4,160
Self-citationWhy do humans reason? Arguments for an argumentative theory
Mercier, H., & Sperber, D. (2011) · Behavioral and Brain Sciences · doi:10.1017/s0140525x10000968 · Cited by 2,254
Pennycook, G., & Rand, D. G. (2019) · Cognition · doi:10.1016/j.cognition.2018.06.011 · Cited by 2,022
Self-citationShifting attention to accuracy can reduce misinformation online
Pennycook, G., Epstein, Z., Mosleh, M., Arechar, A. A., Eckles, D., & Rand, D. G. (2021) · Nature · doi:10.1038/s41586-021-03344-2 · Cited by 1,155
Self-citationThe Cognitive Reflection Test as a predictor of performance on heuristics-and-biases tasks
Toplak, M. E., West, R. F., & Stanovich, K. E. (2011) · Memory & Cognition · doi:10.3758/s13421-011-0104-1 · Cited by 1,047
Coppock, A., & McClellan, O. A. (2019) · Research & Politics · doi:10.1177/2053168018822174 · Cited by 987
Berinsky, A. J., Margolis, M. F., & Sances, M. W. (2014) · American Journal of Political Science · doi:10.1111/ajps.12081 · Cited by 951
Fighting misinformation on social media using crowdsourced judgments of news source quality
Pennycook, G., & Rand, D. G. (2019) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1806781116 · Cited by 947 · cited 4×
“…2017; Van Bavel & Pereira, 2018), our data are more consistent with recent studies on political misinformation that provide both correlational (Pennycook & Rand, 2019b; including data from Twitter sharing, Mosleh, Pennycook, Arechar, & Rand, 2020) and experimental (Bago, Rand, & Pennycook,…”
BackgroundResultInfluentialSelf-citationMotivated numeracy and enlightened self-government
KAHAN, D. M., PETERS, E., DAWSON, E. C., & SLOVIC, P. (2017) · Behavioural Public Policy · doi:10.1017/bpp.2016.2 · Cited by 883
The Partisan Brain: An Identity-Based Model of Political Belief
Van Bavel, J. J., & Pereira, A. (2018) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2018.01.004 · Cited by 743
Analytic thinking reduces belief in conspiracy theories
Swami, V., Voracek, M., Stieger, S., Tran, U. S., & Furnham, A. (2014) · Cognition · doi:10.1016/j.cognition.2014.08.006 · Cited by 726
Moral outrage in the digital age
Crockett, M. J. (2017) · Nature Human Behaviour · doi:10.1038/s41562-017-0213-3 · Cited by 618 · cited 2×
“Thus, attention may by default be focused on other factors, such as concerns about social validation and reinforcement (e.g., Brady, Crockett, & Van Bavel, 2020; Crockett, 2017) rather than accuracy.”
BackgroundInvestigating an alternate form of the cognitive reflection test
Thomson, K. S., & Oppenheimer, D. M. (2016) · Judgment and Decision Making · doi:10.1017/s1930297500007622 · Cited by 612
Fake news, fast and slow: Deliberation reduces belief in false (but not true) news headlines.
Bago, B., Rand, D. G., & Pennycook, G. (2020) · Journal of Experimental Psychology: General · doi:10.1037/xge0000729 · Cited by 593
Self-citationShin, J., & Thorson, K. (2017) · Journal of Communication · doi:10.1111/jcom.12284 · Cited by 481
The Robot's Rebellion: Finding Meaning in the Age of Darwin
Stanovich, K. (2004) · Choice Reviews Online · doi:10.5860/choice.42-2149 · Cited by 480
(2014) · iConference 2014 Proceedings · doi:10.9776/14308 · Cited by 423
Misconceptions, Misinformation, and the Logic of Identity-Protective Cognition
Kahan, D. M. (2017) · doi:10.2139/ssrn.2973067 · Cited by 423
Brady, W. J., Crockett, M. J., & Van Bavel, J. J. (2020) · Perspectives on Psychological Science · doi:10.1177/1745691620917336 · Cited by 417
Everyday Consequences of Analytic Thinking
Pennycook, G., Fugelsang, J. A., & Koehler, D. J. (2015) · Current Directions in Psychological Science · doi:10.1177/0963721415604610 · Cited by 384
Self-citationThe Robot's Rebellion: Finding Meaning in the Age of Darwin
Stanovich, K. E. (2004) · Cited by 316
Is the cognitive reflection test a measure of both reflection and intuition?
Pennycook, G., Cheyne, J. A., Koehler, D. J., & Fugelsang, J. A. (2015) · Behavior Research Methods · doi:10.3758/s13428-015-0576-1 · Cited by 280
Self-citationRisen, J. L. (2016) · Psychological Review · doi:10.1037/rev0000017 · Cited by 221
Disinformation’s spread: bots, trolls and all of us
Starbird, K. (2019) · Nature · doi:10.1038/d41586-019-02235-x · Cited by 203
Pausing to consider why a headline is true or false can help reduce the sharing of false news
Fazio, L. (2020) · Harvard Kennedy School Misinformation Review · doi:10.37016/mr-2020-009 · Cited by 187
Cognitive reflection correlates with behavior on Twitter
Mosleh, M., Pennycook, G., Arechar, A. A., & Rand, D. G. (2021) · Nature Communications · doi:10.1038/s41467-020-20043-0 · Cited by 175
Self-citationMosleh, M., Pennycook, G., & Rand, D. G. (2020) · PLoS ONE · doi:10.1371/journal.pone.0228882 · Cited by 172
Self-citationLindeman, M., & Svedholm‐Häkkinen, A. M. (2012) · Review of General Psychology · doi:10.1037/a0027158 · Cited by 147
Lee, C., Shin, J., & Hong, A. (2018) · Telematics and Informatics · doi:10.1016/j.tele.2017.11.005 · Cited by 131
Shifting attention to accuracy can reduce misinformation onlinePreprint
Pennycook, G., Epstein, Z., Mosleh, M., et al. (2019) · doi:10.31234/osf.io/3n9u8 · Cited by 119
Self-citationThe illusion of explanatory depth and endorsement of conspiracy beliefs
Vitriol, J. A., & Marsh, J. K. (2018) · European Journal of Social Psychology · doi:10.1002/ejsp.2504 · Cited by 118 · cited 1×
“…to lack of truth discernment for health misinformation is the type of intuitive or emotional thinking that has been associated with conspiratorial beliefs (Swami, Voracek, Stieger, Tran, & Furnham, 2014; Vitriol & Marsh, 2018) and superstition (Elk, 2013; Lindeman & Svedholm, 2012; Risen, 2016).”
BackgroundCognitive Reflection is a Stable Trait
Stagnaro, M. N., Pennycook, G., & Rand, D. G. (2018) · Judgment and Decision Making · doi:10.1017/s1930297500007695 · Cited by 116
Self-citationScience beliefs, political ideology, and cognitive sophistication.
Pennycook, G., Bagó, B., & McPhetres, J. (2022) · Journal of Experimental Psychology General · doi:10.1037/xge0001267 · Cited by 109
Self-citationDevelopment of the Medical Maximizer-Minimizer Scale.
Scherer, L. D., Caverly, T. J., Burke, J. F., Zikmund‐Fisher, B. J., Kullgren, J. T., Steinley, D., McCarthy, D. M., Roney, M. E., & Fagerlin, A. (2016) · Health Psychology · doi:10.1037/hea0000417 · Cited by 102
Paranormal believers are more prone to illusory agency detection than skeptics
van Elk, M. (2013) · Consciousness and Cognition · doi:10.1016/j.concog.2013.07.004 · Cited by 93
Science beliefs, political ideology, and cognitive sophisticationPreprint
Pennycook, G., Bagó, B., & McPhetres, J. (2019) · doi:10.31219/osf.io/ad9v7 · Cited by 37
Self-citationBeyond “fake news”: Analytic thinking and the detection of false and hyperpartisan news headlinesPreprint
Ross, R. M., Rand, D. G., & Pennycook, G. (2019) · doi:10.31234/osf.io/cgsx6 · Cited by 36
Self-citationCognitive reflection correlates with behavior on TwitterPreprint
Mosleh, M., Pennycook, G., Arechar, A. A., et al. (2019) · doi:10.31234/osf.io/qaswn · Cited by 17
Self-citationDigital fingerprints of cognitive reflectionPreprint
Pennycook, G., Rand, D. G., Mosleh, M., & Arechar, A. A. (2019) · Cited by 5
Self-citation
Research works printed but not linked: 2
- Adhanom Ghebreyesus T. (2020, February 15). Munich Security Conference. World Health Organization. Retrieved from https://www.who.int/dg/speeches/detail/munich-security-conference
- Ross R. M., 2019, PsyArXiv
Cited by
Sorted by citations
Measuring the impact of COVID-19 vaccine misinformation on vaccination intent in the UK and USA
Loomba, S., de Figueiredo, A., Piatek, S. J., de Graaf, K., & Larson, H. J. (2021) · Nature Human Behaviour · doi:10.1038/s41562-021-01056-1 · Cited by 1,800
Functional Fear Predicts Public Health Compliance in the COVID-19 Pandemic
Harper, C. A., Satchell, L. P., Fido, D., & Latzman, R. D. (2021) · International Journal of Mental Health and Addiction · doi:10.1007/s11469-020-00281-5 · Cited by 1,564
The psychological drivers of misinformation belief and its resistance to correction
Ecker, U. K. H., Lewandowsky, S., Cook, J., Schmid, P., Fazio, L. K., Brashier, N., Kendeou, P., Vraga, E. K., & Amazeen, M. A. (2022) · Nature Reviews Psychology · doi:10.1038/s44159-021-00006-y · Cited by 1,372
Pennycook, G., & Rand, D. G. (2021) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2021.02.007 · Cited by 1,360
“For example, participants who were asked about the accuracy of a set of headlines rated true headlines as much more accurate than false headlines; but, when asked whether they would share the headlines, veracity had little impact on sharing intentions – both in the context of political headlines [21] (Figure 2A) and h…”
BackgroundInfluentialSelf-citationPuri, N., Coomes, E. A., Haghbayan, H., & Gunaratne, K. (2020) · Human Vaccines & Immunotherapeutics · doi:10.1080/21645515.2020.1780846 · Cited by 1,229
Metadata
- Authors
- Pennycook, G., McPhetres, J., Zhang, Y., Lu, J. G., & Rand, D. G.
- Affiliations
- University of Regina (CA)
- Massachusetts Institute of Technology (US)
- Corresponding author
- Pennycook, Gordon
- Venue
- Psychological Science
- Publisher
- SAGE Publications
- Published
- 2020-06-30
- Volume
- 31
- Issue
- 7
- Pages
- 770-780
- ISSN
- 0956-7976 (ISSN-L)
- 1467-9280
- PMC
- PMC7366427
- OpenAlex
- W3013473577
- Cited by
- 1,715
- References
- 38
- Citations by year
- 2026: 111 · 2025: 188 · 2024: 238 · 2023: 299 · 2022: 329 · 2021: 416 · 2020: 132
- FWCI
- 393.97
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Psychological Science (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc-sa)
- Funders
- miami foundation
- William and Flora Hewlett Foundation
- Omidyar Network
- John Templeton Foundation
- Canadian Institutes of Health Research
- Social Sciences and Humanities Research Council of Canada
- Topics
- Social Sciences › Sociology and Political Science › Misinformation and Its Impacts
- Social Sciences › Communication › Communication and COVID-19 Impact
- Social Sciences › Library and Information Sciences › Academic Publishing and Open Access
- Keywords
- COVID-19 misinformation, social media sharing, truth discernment, fake news, cognitive reflection, scientific knowledge, misinformation prevention, sharing intention
- MeSH terms
- Betacoronavirus, COVID-19, SARS-CoV-2, Adolescent, Adult, Aged, Aged, 80 and over, Communication, Decision Making, Female, Humans, Male, Middle Aged, Pneumonia, Viral, Coronavirus Infections, Information Dissemination, Young Adult, Pandemics, Social Media
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review