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When experts are trusted for the wrong thing
A credible professional can accidentally lend authority to a false claim when they speak confidently beyond what they actually know.
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- Expertise versus trustworthiness
- Why confidence travels beyond competence
- How to weigh claims across specialties
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Introduction
A common misconception about expertise is that it travels intact from one subject to another. In reality, a person can be highly knowledgeable in one field and badly mistaken in another. Yet when a respected surgeon comments on economics, a famous physicist promotes a medical claim, or a successful entrepreneur explains history, audiences often carry over trust earned in one domain and apply it to a different one. This is one way myths survive: not because the speaker lacks ability, but because credibility becomes detached from the limits of their actual expertise. Research on source credibility consistently finds that people use cues such as expertise, trustworthiness and authority when deciding what to believe, especially when they cannot independently verify a claim. [Advances.in]advances.inSource credibility effects in misinformation research: A review…by V Mang · 2024 · Cited by 14 — We searched Web of Science, Scopus, a… ScienceDirect The risk is not that experts are useless guides. Modern societies depend on expertise. The problem appears when professional status is treate [sciencedirect.com]sciencedirect.comScienceDirect Source credibilityScienceDirectSource credibility - an overviewA source's credibility rests on two major characteristics: expertise and trustworthiness… d as a general licence to speak authoritatively on any subject. At that point, genuine expertise can unintentionally become a vehicle for misinformation.
Expertise versus trustworthiness
People often combine two separate questions into one:
- Is this person knowledgeable?
- Is this person knowledgeable about this specific topic?
Source-credibility research has long distinguished expertise from trustworthiness. Expertise refers to whether a person is in a position to know. Trustworthiness refers to whether they are likely to be honest and reliable. Someone may score highly on one dimension without automatically scoring highly on the other. [2flanagin.faculty.comm.ucsb.edu]flanagin.faculty.comm.ucsb.edue trustworthiness and expertise, and the effect of credibility on changes in attitudes…Read more…
The confusion begins when audiences treat expertise as a personal trait rather than a domain-specific one. A respected cardiologist may be an excellent source on heart disease but not necessarily on climate modelling. A Nobel Prize-winning chemist may understand chemistry deeply without possessing special insight into public health policy. Credentials often create a “halo effect” in which success in one area spills over into perceived competence elsewhere. [The Decision Lab]thedecisionlab.comThe Decision LabAuthority BiasThe authority bias is a cognitive bias which refers to our tendency to be more influenced by the opinions a…
This is usually not deliberate deception. The expert may sincerely believe they are applying sound reasoning. The audience may sincerely believe they are following a trustworthy authority. The mismatch lies in the assumption that expertise transfers automatically across fields.
Why specialist knowledge is narrower than it looks
Modern expertise is highly specialised. Scientific, medical and technical fields often require years of training focused on specific methods, evidence standards and bodies of literature. Being a leading authority in molecular biology does not automatically provide expertise in epidemiology. Being an economist does not automatically provide expertise in neuroscience.
Outside observers often underestimate this specialisation because professional titles are broad and prestigious. The public sees “scientist”, “doctor” or “professor”, while practitioners themselves usually recognise numerous boundaries within those categories.
The result is a recurring pattern: a credible professional speaks outside their specialty, audiences continue to trust them because of their status, and the claim gains more influence than it would have received from a non-expert making exactly the same argument.
Why confidence travels beyond competence
Authority bias describes the tendency to assign extra weight to claims made by perceived authorities. People often evaluate information partly through the status of the speaker rather than solely through the evidence itself. [The Decision Lab]thedecisionlab.comThe Decision LabAuthority BiasThe authority bias is a cognitive bias which refers to our tendency to be more influenced by the opinions a… [dovetail]dovetail.comwhat is authority biasWhat you need to know about authority bias17 Jan 2024 — Authority bias is a tendency to attribute greater accuracy and truth to statement… This becomes especially powerful when confidence accompanies prestige. A confident statement delivered by a decorated expert can feel more persuasive than a cautious statement delivered by a less famous specialist. Yet confidence is not a reliable indicator of correctness.
Several mechanisms help explain why myths can spread through respected figures:
Status reduces scepticism. Audiences often lower their guard when hearing a recognised authority. Questions that might be asked of an unknown speaker go unasked. [The Decision Lab]thedecisionlab.comThe Decision LabAuthority BiasThe authority bias is a cognitive bias which refers to our tendency to be more influenced by the opinions a…
Media incentives reward certainty. Television, podcasts and social media tend to reward clear opinions and strong narratives. Experts who express uncertainty may appear less compelling than those who offer confident conclusions.
Professional success can encourage overreach. Repeated success within one field may create a reasonable belief in one’s own judgement. Over time, that confidence can extend into areas where the evidence base is unfamiliar. Researchers studying expertise bias have examined how people can assign excessive epistemic authority to recognised experts, even outside the relevant domain. [SWPS University]english.swps.plSWPS UniversityThe Expertise Bias: its psychological mechanisms, sources…The main goal of the present project will be to study how lay…
Audiences prefer cognitive shortcuts. Most people cannot independently evaluate complex scientific or technical claims. Trusting experts is usually sensible. Problems emerge when the shortcut becomes too broad and the audience stops asking whether the authority is actually relevant to the topic at hand. [OUP Academic]academic.oup.comOUP AcademicCredibility Assessments of Online Health Informationby MS Eastin · 2001 · Cited by 610 — For example, as personal relevance i…
The “Nobel disease” problem
One of the most discussed illustrations of this pattern is the informal idea known as “Nobel disease”. The term refers to cases where Nobel Prize winners later endorse claims that many experts regard as unsupported or pseudoscientific, often outside the area for which they received their prize. [Wikipedia]WikipediaSource credibilitySource credibility
The phrase is controversial because it can be used too casually. Winning a Nobel Prize does not make someone irrational, and some unconventional ideas later turn out to be correct. The more important lesson is narrower: extraordinary achievement in one field does not eliminate the possibility of error elsewhere.
Even Nobel laureates themselves have warned about this tendency. According to accounts cited in discussions of the phenomenon, Nobel Prize-winning biologist Paul Nurse cautioned winners against believing they had become experts on nearly everything simply because they had received the prize. [Wikipedia]WikipediaAuthority biasAuthority biasAuthority bias is the tendency to attribute greater accuracy to the opinion of an authority figure (unrelated to its con…
The significance of these cases is not that experts sometimes make mistakes. Everyone does. The significance is that the public often treats prestigious credentials as universal evidence of authority. The myth gains strength not from the claim itself but from the reputation attached to it.
When myths become harder to correct
False claims spread by respected experts can be unusually resilient because the correction faces a credibility problem.
Research on misinformation shows that source credibility influences how people evaluate both the original claim and later corrections. Expertise and trustworthiness affect whether audiences update their beliefs. [PMC]pmc.ncbi.nlm.nih.govPMCby MW Susmann · 2022 · Cited by 24 — Past research suggests that the trustworthiness of a source issuing a retraction of misinformatio… [ScienceDirect Imagine two scenarios:]sciencedirect.comScienceDirect Source credibilityScienceDirectSource credibility - an overviewA source's credibility rests on two major characteristics: expertise and trustworthiness…
- An unsupported medical claim comes from an anonymous social-media account.
- The same claim comes from a famous physician speaking outside their specialty.
The factual content is identical, but the second version is likely to receive greater attention and trust because the source appears more credible.
Studies of misinformation correction suggest that highly credible sources can make misinformation more resistant to change. People often compare the status of the correcting source against the status of the original source rather than evaluating the correction in isolation. NYMCTU Academic Hub [Springer Link]link.springer.comSpringer LinkThe impact of misinformation corrections on source perceptionsby V Westbrook · 2023 · Cited by 26 — Birds of a feather are p…
This helps explain why expert-driven myths can linger. The audience may feel that rejecting the claim requires rejecting the authority figure who delivered it. Once trust becomes attached to the source, factual correction alone may not be enough.
How to weigh claims across specialties
The practical challenge is not learning to distrust experts. It is learning to match expertise to the question being asked.
A useful approach is to separate the speaker’s reputation from the speaker’s relevant qualifications.
Ask what field the claim belongs to
When evaluating a claim, identify the discipline that would normally investigate it.
A claim about vaccine effectiveness belongs primarily to epidemiology, immunology and public-health research. A claim about economic growth belongs primarily to economics. A claim about historical events belongs primarily to historical scholarship.
The key question is whether the speaker has recognised expertise in that specific area rather than whether they are impressive in general.
Look for specialist consensus
Individual experts can be wrong. Broad expert agreement across a field is usually more informative than the opinion of a single prominent figure.
A lone celebrity scientist making a dramatic claim may attract attention. A position shared by multiple specialists using different methods is generally a stronger indicator of reliability.
Notice when prestige is doing the work
Sometimes an argument relies more on the speaker’s achievements than on evidence.
If the main reason a claim seems persuasive is that the person is famous, accomplished or highly credentialled, that is a signal to examine the evidence more carefully. Philosophers and critical-thinking researchers describe this problem as a form of misplaced authority: a person may be an authority, but not on the matter currently being discussed. [Philosophy Stack Exchange]philosophy.stackexchange.comPhilosophy Stack ExchangeFallacy/Cognitive Bias of assuming that being an expert in…30 Dec 2021 — The belief that expertise is transit…
Pay attention to uncertainty
Experts speaking within their field often acknowledge limits, caveats and unresolved questions. Overconfidence can be a warning sign, especially when discussing complex topics.
Confidence alone is not evidence. In many technical domains, uncertainty is a normal feature of competent expertise rather than a sign of weakness.
The real lesson about trust
The solution to myths spread by trusted experts is not blanket scepticism. Societies depend on specialised knowledge, and most people cannot personally verify every scientific, medical or technical claim they encounter.
The more useful lesson is that expertise has boundaries. Trust works best when it is calibrated to those boundaries rather than detached from them. A respected expert deserves attention within their field because they have earned it through knowledge and experience. Outside that field, they become what everyone else is: a person who may have useful insights, but whose claims still require evidence.
Many myths persist because audiences ask, “Is this person smart?” when the more important question is, “Is this person qualified to know this particular thing?” The difference between those questions is often the difference between informed trust and misplaced authority.
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The death of expertise
First published 2017. Subjects: Higher Education, Sociology of Knowledge, Theory of Knowledge, Internet, Expertise.
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Endnotes
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Source: advances.in
Link: https://advances.in/psychology/10.56296/aip00028/Source snippet
Source credibility effects in misinformation research: A review...by V Mang · 2024 · Cited by 14 — We searched Web of Science, Scopus, a...
-
Source: sciencedirect.com
Title: ScienceDirect Source credibility
Link: https://www.sciencedirect.com/topics/social-sciences/source-credibilitySource snippet
ScienceDirectSource credibility - an overviewA source's credibility rests on two major characteristics: expertise and trustworthiness...
-
Source: flanagin.faculty.comm.ucsb.edu
Link: https://flanagin.faculty.comm.ucsb.edu/CV/Hocevaretal2018%28E%29.pdfSource snippet
e trustworthiness and expertise, and the effect of credibility on changes in attitudes...Read more...
-
Source: Wikipedia
Title: Source credibility
Link: https://en.wikipedia.org/wiki/Source_credibility -
Source: Wikipedia
Title: Authority bias
Link: https://en.wikipedia.org/wiki/Authority_biasSource snippet
Authority biasAuthority bias is the tendency to attribute greater accuracy to the opinion of an authority figure (unrelated to its con...
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Source: dovetail.com
Title: what is authority bias
Link: https://dovetail.com/research/what-is-authority-bias/Source snippet
What you need to know about authority bias17 Jan 2024 — Authority bias is a tendency to attribute greater accuracy and truth to statement...
-
Source: english.swps.pl
Link: https://english.swps.pl/42-research/research-project-database/research-projects/2239-the-expertise-biasSource snippet
SWPS UniversityThe Expertise Bias: its psychological mechanisms, sources...The main goal of the present project will be to study how lay...
-
Source: academic.oup.com
Link: https://academic.oup.com/jcmc/article/6/4/JCMC643/4584226Source snippet
OUP AcademicCredibility Assessments of Online Health Informationby MS Eastin · 2001 · Cited by 610 — For example, as personal relevance i...
-
Source: sciencedirect.com
Link: https://www.sciencedirect.com/science/article/abs/pii/S0306457324001079Source snippet
News sharing on UK social media: Misinformation, disinformation, and correction. Retrieved from. (2019). F. Chao et al. Causal inference...
-
Source: Wikipedia
Title: Nobel disease
Link: https://en.wikipedia.org/wiki/Nobel_disease -
Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9718466/Source snippet
PMCby MW Susmann · 2022 · Cited by 24 — Past research suggests that the trustworthiness of a source issuing a retraction of misinformatio...
-
Source: sciencedirect.com
Link: https://www.sciencedirect.com/science/article/pii/S0010027725000307Source snippet
trustworthiness both had a positive effect on perceived reliability. These findings highlight the impact of source expertise when correct...
-
Source: scholar.nycu.edu.tw
Title: credibility of misinformation source moderates the effectiveness
Link: https://scholar.nycu.edu.tw/en/publications/credibility-of-misinformation-source-moderates-the-effectiveness-/Source snippet
NYMCTU Academic HubCredibility of misinformation source moderates the...by HK Zeng · 2023 · Cited by 23 — To reduce perceived credibilit...
-
Source: link.springer.com
Link: https://link.springer.com/article/10.3758/s13421-023-01402-wSource snippet
Springer LinkThe impact of misinformation corrections on source perceptionsby V Westbrook · 2023 · Cited by 26 — Birds of a feather are p...
-
Source: thedecisionlab.com
Link: https://thedecisionlab.com/biases/authority-biasSource snippet
The Decision LabAuthority BiasThe authority bias is a cognitive bias which refers to our tendency to be more influenced by the opinions a...
-
Source: philosophy.stackexchange.com
Link: https://philosophy.stackexchange.com/questions/88666/fallacy-cognitive-bias-of-assuming-that-being-an-expert-in-one-field-makes-you-aSource snippet
Philosophy Stack ExchangeFallacy/Cognitive Bias of assuming that being an expert in...30 Dec 2021 — The belief that expertise is transit...
-
Source: theknowledge.io
Title: The Expert is Always Right?
Link: https://theknowledge.io/authority-bias/Source snippet
Authority Bias - by David Elikwu13 May 2022 — Authority bias is the tendency to believe an authoritative person's methods, opinions, stra...
Published: May 2022
-
Source: science.org
Title: potential fabrication research images threatens key theory alzheimers disease
Link: https://www.science.org/content/article/potential-fabrication-research-images-threatens-key-theory-alzheimers-diseaseSource snippet
Blots on a field?21 Jul 2022 — A neuroscience image sleuth finds signs of fabrication in scores of Alzheimer's articles, threatening a re...
Additional References
-
Source: innerdrive.co.uk
Link: https://www.innerdrive.co.uk/blog/expertise-and-cognitive-biases/Source snippet
Expertise and cognitive biases: 3 risks and what to do...Researchers found that, when people perceive themselves as experts, they are at...
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Source: verdinejad.com
Link: https://verdinejad.com/en/wp-content/uploads/2020/04/Source-Credibility.pdfSource snippet
Source CredibilityThis is because the recipient perceives no motive on the part of the communicator, and therefore judges the communicati...
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Source: theguardian.com
Link: https://www.theguardian.com/science/2024/feb/03/the-situation-has-become-appalling-fake-scientific-papers-push-research-credibility-to-crisis-pointSource snippet
fake scientific papers push research credibility to crisis point3 Feb 2024 — Tens of thousands of bogus research papers are being publish...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/365966628_The_independent_effects_of_source_expertise_and_trustworthiness_on_retraction_believability_The_moderating_role_of_vested_interestSource snippet
The moderating role of vested interestDec 29, 2025 — Past research suggests that the trustworthiness of a source issuing a retraction of...
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Source: reddit.com
Link: https://www.reddit.com/r/todayilearned/comments/1htxgfc/til_about_nobel_disease_a_tendency_for_some_nobel/ -
Source: blogs.bmj.com
Title: time to assume that health research is fraudulent until proved otherwise
Link: https://blogs.bmj.com/bmj/2021/07/05/time-to-assume-that-health-research-is-fraudulent-until-proved-otherwise/Source snippet
to assume that health research is fraudulent until...5 Jul 2021 — We have now reached a point where those doing systematic reviews must...
-
Source: journals.sagepub.com
Title: The independent effects of source expertise and trustworthiness on retraction
Link: https://journals.sagepub.com/doi/10.1177/00332941261438080Source snippet
the Believability of Social Media MisinformationMar 28, 2026 — What is unique about acceptance and correction of misinformation...
-
Source: www-ncbi-nlm-nih-gov.ezp-prod1.hul.harvard.edu
Link: https://www-ncbi-nlm-nih-gov.ezp-prod1.hul.harvard.edu/pubmed/21034761Source snippet
harvard.edu[https://www-ncbi-nlm-nih-gov.ezp-prod1.hul.harvard...No](https://www-ncbi-nlm-nih-gov.ezp-prod1.hul.harvard...No) information is available for this page...
-
Source: research.ed.ac.uk
Title: the effects of source expertise and trustworthiness on recollecti
Link: https://www.research.ed.ac.uk/en/publications/the-effects-of-source-expertise-and-trustworthiness-on-recollectiSource snippet
Edinburgh ResearchThe effects of source expertise and trustworthiness on...by S Pluviano · 2020 · Cited by 65 — Experiment 2 revealed th...
-
Source: theness.com
Title: beware the nobel laureate argument from authority
Link: https://theness.com/neurologicablog/beware-the-nobel-laureate-argument-from-authority/Source snippet
15 Jul 2010 — To me this is the perfect example of a brilliant scientist stepping outside his area of expertise and trying to apply the w...
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