Evidence map›Paper›PMID 27432950›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Boosting medical diagnostics by pooling independent judgments.

Ralf H J M Kurvers, Stefan M Herzog, Ralph Hertwig, Jens Krause, Patricia A Carney, Andy Bogart, Giuseppe Argenziano, Iris Zalaudek, Max Wolf

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 1 pooled it
18.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

76 citing papers in PubMed, 1 synthesis or guideline pooled it, 201 citations in OpenAlex.

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  11. Subjective Confidence as a Monitor of the Replicability of the Response.Perspectives on psychological science : a journal of the Association for Psychological Science · 2025
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  12. Human-AI collectives most accurately diagnose clinical vignettes.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  17. Appraisal of current surgical guidelines for inflammatory bowel disease using the AGREE-S instrument: A scoping review.Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland · 2024
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  20. Blinding to Circumvent Human Biases: Deliberate Ignorance in Humans, Institutions, and Machines.Perspectives on psychological science : a journal of the Association for Psychological Science · 2024
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16 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 6 institutions in 4 countries.

Ralf H J M KurversCenter for Adaptive Rationality, Max Planck Institute for Human Development, 14195 Berlin, Germany; Department of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany; kurvers@mpib-berlin.mpg.de.
Stefan M HerzogCenter for Adaptive Rationality, Max Planck Institute for Human Development, 14195 Berlin, Germany;
Ralph HertwigCenter for Adaptive Rationality, Max Planck Institute for Human Development, 14195 Berlin, Germany;
Jens KrauseDepartment of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany;
Patricia A CarneyDepartment of Family Medicine, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97239; Department of Public Health & Preventive Medicine, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97239;
Andy BogartGroup Health Research Institute, Seattle, WA 98101;
Giuseppe ArgenzianoDepartment of Dermatology, Second University of Naples, 80131 Naples, Italy;
Iris ZalaudekDepartment of Dermatology and Venerology, Medical University of Graz, 8036 Graz, Austria.
Max WolfDepartment of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany;
Max Planck Institute for Human Development · DELeibniz Institute of Freshwater Ecology and Inland Fisheries · DEKaiser Permanente Washington Health Research Institute · USMedical University of Graz · ATOregon Health & Science University · USUniversity of Naples Federico II · IT

Funding

NCI NIH HHS HHSN261201100031C
6 · The paper itself

Abstract

Collective intelligence refers to the ability of groups to outperform individual decision makers when solving complex cognitive problems. Despite its potential to revolutionize decision making in a wide range of domains, including medical, economic, and political decision making, at present, little is known about the conditions underlying collective intelligence in real-world contexts. We here focus on two key areas of medical diagnostics, breast and skin cancer detection. Using a simulation study that draws on large real-world datasets, involving more than 140 doctors making more than 20,000 diagnoses, we investigate when combining the independent judgments of multiple doctors outperforms the best doctor in a group. We find that similarity in diagnostic accuracy is a key condition for collective intelligence: Aggregating the independent judgments of doctors outperforms the best doctor in a group whenever the diagnostic accuracy of doctors is relatively similar, but not when doctors' diagnostic accuracy differs too much. This intriguingly simple result is highly robust and holds across different group sizes, performance levels of the best doctor, and collective intelligence rules. The enabling role of similarity, in turn, is explained by its systematic effects on the number of correct and incorrect decisions of the best doctor that are overruled by the collective. By identifying a key factor underlying collective intelligence in two important real-world contexts, our findings pave the way for innovative and more effective approaches to complex real-world decision making, and to the scientific analyses of those approaches.

Indexed as

Decision MakingIntelligenceJudgmentAdultAgedAlgorithmsBreast NeoplasmsFemaleHumansMiddle AgedSensitivity and SpecificitySkin Neoplasmscollective intelligencedermatologygroupsmammographymedical diagnostics

Identifiers

PMID27432950
PMCPMC4978286
OpenAlexW2481585384

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.