Evidence map›Paper›PMID 39568361›Full record

ArticleApplied psychology. Health and well-being2025

Assessing the role of conspiracy beliefs in oncological treatment decisions: An experimental approach.

Florent Varet, Valentyn Fournier, Sylvain Delouvée

Abstract read
In one paragraph

Article in Applied psychology. Health and well-being, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 citing papers in PubMed.

  1. Fighting fire with fire: Prebunking with the use of a plausible meta-conspiracy framing.British journal of psychology (London, England : 1953) · 2026
    Article
  2. 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

3 authors.

Florent VaretANTHROPO-LAB - ETHICS EA7446, Université Catholique de Lille, F-59000 Lille, France.ORCID 0000-0002-5248-3740
Valentyn FournierUniv. Lille, CNRS, UMR 9193 - SCALab - Sciences Cognitives et Sciences Affectives, Lille, France.ORCID 0000-0002-1289-8968
Sylvain DelouvéeLP3C (Laboratoire de Psychologie: Cognition, Comportement, Communication), Rennes 2 University, Rennes, France.ORCID 0000-0002-4029-597X

Funding

Cancéropôle Nord-Ouest (CNO) 2022/08
6 · The paper itself

Abstract

Cancer is an important issue and a model topic for misinformatfion researchers. The present research experimentally investigates the effect of cancer-related conspiracy beliefs and misinformation on oncology treatment intentions in a cancer-free population. In three pre-registered studies (N total = 1020), participants were asked to put themselves in the shoes of a patient recommended for chemotherapy. Study 1 (N = 300) failed to experimentally manipulate cancer-related conspiracy beliefs with exposure to a health scandal not related to cancer. In Study 2 (N = 258), exposure to a pro-conspiracy (vs. anti-conspiracy) content related to cancer treatment was associated with more conspiracy beliefs, less intention to use chemotherapy and more intentions to use unconventional medicines. Exploratory analyses revealed that these effects were conditioned by the credibility of the misinformation. Study 3 (N = 462) replicated these findings using a full experimental design. Exposure (vs. no exposure) to a warning and accuracy prompt, prior to exposure to the pro-conspiracy content, was found to be effective in reducing its credibility and preventing its detrimental effects. These findings corroborate the existence of an effect of conspiracy beliefs on treatment intentions in oncology and also suggest several ways to mitigate them.

Indexed as

Health Knowledge, Attitudes, PracticeIntentionNeoplasmsAdolescentAdultAgedCommunicationDecision MakingFemaleHumansMaleMiddle AgedYoung Adultcancercomplementary and alternative medicineconspiracy beliefsconventional medicinecredibilitymisinformation

Identifiers

PMID39568361
PMCPMC11652127

What OpenQuestion holds

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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.