Evidence map›Paper›PMID 39433937›Full record

ArticleNature human behaviour2025

Effectiveness of ex ante honesty oaths in reducing dishonesty depends on content.

Janis H Zickfeld, Karolina A Ścigała, Christian T Elbæk, John Michael, Mathilde H Tønnesen, Gabriel Levy, Shahar Ayal, Isabel Thielmann, Laila Nockur, Eyal Peer and 32 more

Abstract read
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In one paragraph

Article in Nature human behaviour, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
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

6 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Honesty oaths for rule-following.Nature human behaviour · 2025
    Article
  6. Article
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

42 authors.

Janis H ZickfeldDepartment of Management, Aarhus University, Aarhus, Denmark. jhzickfeld@gmail.com.ORCID 0000-0001-7660-2719
Karolina A ŚcigałaDepartment of Psychology and Behavioural Sciences, Aarhus University, Aarhus, Denmark.ORCID 0000-0003-4689-0697
Christian T ElbækDepartment of Management, Aarhus University, Aarhus, Denmark.ORCID 0000-0002-7039-4565
John MichaelDepartment of Philosophy, University of Milan, Milan, Italy.ORCID 0000-0003-4516-196X
Mathilde H TønnesenDepartment of Management, Aarhus University, Aarhus, Denmark.ORCID 0000-0003-2979-138X
Gabriel LevyDepartment of Philosophy and Religious Studies, NTNU Trondheim, Trondheim, Norway.ORCID 0000-0002-4317-2043
Shahar AyalBaruch Ivcher School of Psychology, Reichman University, Herzliya, Israel.ORCID 0000-0002-7357-1969
Isabel ThielmannMax Planck Institute for the Study of Crime, Security and Law, Freiburg, Germany.ORCID 0000-0002-9071-5709
Laila NockurDepartment of Psychology and Behavioural Sciences, Aarhus University, Aarhus, Denmark.ORCID 0000-0001-5423-867X
Eyal PeerFedermann School of Public Policy, Hebrew University of Jerusalem, Jerusalem, Israel.ORCID 0000-0002-9891-5297
Valerio CapraroDepartment of Psychology, University of Milan Bicocca, Milan, Italy.ORCID 0000-0002-0579-0166
Rachel BarkanDepartment of Business Administration, Ben-Gurion University of the Negev, Beersheba, Israel.ORCID 0000-0001-7141-9077
Simen BøDepartment of Strategy and Management, Norwegian School of Economics, Bergen, Norway.ORCID 0000-0001-9076-5362
Štěpán BahníkDepartment of Management, Prague University of Economics and Business, Prague, Czech Republic.ORCID 0000-0002-0579-6808
Daniele NosenzoDepartment of Economics and Business Economics, Aarhus University, Aarhus, Denmark.ORCID 0000-0002-0831-5408
Ralph HertwigMax Planck Institute for Human Development, Berlin, Germany.ORCID 0000-0002-9908-9556
Nina MazarQuestrom School of Business, Boston University, Boston, MA, USA.ORCID 0000-0001-8248-654X
Alexa WeissDepartment of Psychology, Bielefeld University, Bielefeld, Germany.ORCID 0000-0002-5718-5961
Ann-Kathrin KoesslerInstitute of Environmental Planning, Leibniz University Hannover, Hannover, Germany.ORCID 0000-0002-8516-2900
Ronit Montal-RosenbergFedermann School of Public Policy, Hebrew University of Jerusalem, Jerusalem, Israel.ORCID 0000-0002-6769-2473
Sebastian HafenbrädlIESE Business School, University of Navarra, Barcelona, Spain.ORCID 0000-0002-5148-766X
Yngwie Asbjørn NielsenDepartment of Psychology and Behavioural Sciences, Aarhus University, Aarhus, Denmark.ORCID 0000-0002-5356-354X
Patricia KanngiesserSchool of Psychology, University of Plymouth, Plymouth, UK.ORCID 0000-0003-1068-3725
Simon SchindlerFederal University of Applied Administrative Sciences, Berlin, Germany.ORCID 0000-0003-1764-7241
Philipp GerlachFresenius University, Hamburg, Germany.
Nils KöbisMax Planck Institute for Human Development, Berlin, Germany.ORCID 0000-0002-0608-7333
Nicolas JacquemetParis School of Economics, Paris, France.ORCID 0000-0002-5056-9225
Marek VrankaFaculty of Social Sciences, Charles University, Prague, Czech Republic.ORCID 0000-0003-3413-9062
Dan ArielyFuqua School of Busisness, Duke University, Durham, NC, USA.ORCID 0000-0002-6175-4151
Jareef Bin MartuzaDepartment of Strategy and Management, Norwegian School of Economics, Bergen, Norway.ORCID 0000-0002-6790-5846
Yuval FeldmanFaculty of Law, Bar Ilan University, Ramat Gan, Israel.
Michał BiałekInstitute of Psychology, University of Wrocław, Wrocław, Poland.ORCID 0000-0002-5062-5733
Jan K WoikeMax Planck Institute for Human Development, Berlin, Germany.ORCID 0000-0002-6816-121X
Zoe RahwanMax Planck Institute for Human Development, Berlin, Germany.ORCID 0000-0003-1506-0105
Alicia SeidlMax Planck Institute for the Study of Crime, Security and Law, Freiburg, Germany.
Eileen ChouBatten School of Leadership and Public Policy, University of Virginia, Charlottesville, VA, USA.
Agne KajackaiteDepartment of Economics, Management, and Quantitative Methods, University of Milan, Milan, Italy.ORCID 0000-0002-6414-6741
Simeon SchudyInstitute of Economics, Ulm University, Ulm, Germany.ORCID 0000-0002-4409-0576
Ulrich GlogowskyCESifo Munich, Munich, Germany.
Anna Z CzarnaJagiellonian University, Krakow, Poland.ORCID 0000-0002-9861-9455
Stefan PfattheicherDepartment of Psychology and Behavioural Sciences, Aarhus University, Aarhus, Denmark.ORCID 0000-0002-0161-1570
Panagiotis MitkidisDepartment of Management, Aarhus University, Aarhus, Denmark.ORCID 0000-0002-9495-7369

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Dishonest behaviours such as tax evasion impose significant societal costs. Ex ante honesty oaths-commitments to honesty before action-have been proposed as interventions to counteract dishonest behaviour, but the heterogeneity in findings across operationalizations calls their effectiveness into question. We tested 21 honesty oaths (including a baseline oath)-proposed, evaluated and selected by 44 expert researchers-and a no-oath condition in a megastudy involving 21,506 UK and US participants from Prolific.com who played an incentivized tax evasion game online. Of the 21 interventions, 10 significantly improved tax compliance by 4.5 to 8.5 percentage points, with the most successful nearly halving tax evasion. Limited evidence for moderators was found. Experts and laypeople failed to predict the most effective interventions, though experts' predictions were more accurate. In conclusion, honesty oaths were effective in curbing dishonesty, but their effectiveness varied depending on content. These findings can help design impactful interventions to curb dishonesty.

Indexed as

DeceptionTaxesAdultFemaleHumansMaleUnited KingdomUnited States

Identifiers

PMID39433937

What OpenQuestion holds

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Registered trials

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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.