Evidence map›Paper›PMID 39979952›Full record

Trial reportHarm reduction journal2025

Mandatory verses voluntary self-tests for new online casino customers: effect on engagement, quality, gambling behavior and use of responsible gambling measures.

Jakob Jonsson, Nathan Lakew, Philip Lindner

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Harm reduction journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Trial
  2. Trial
  3. 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.

Jakob JonssonCentre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Region Stockholm, Norra Stationsgatan 69, 113 64, Stockholm, Sweden. jakob.Jonsson@ki.se.
Nathan LakewCentre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Region Stockholm, Norra Stationsgatan 69, 113 64, Stockholm, Sweden.
Philip LindnerCentre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Region Stockholm, Norra Stationsgatan 69, 113 64, Stockholm, Sweden.

Funding

Independent Research Council of Svenska Spel FO2021-0017
6 · The paper itself

Abstract

backgroundTo combat the public health concern that is problem gambling, gambling operators are increasingly being required by legislation to exercise a duty of care obligation, including the provision of Responsible Gambling (RG) tools. Self-test assessments have long been a popular RG tool implemented by many operators, yet there has been scant empirical research on self-tests, including on how the method of delivery impacts engagement, quality, and subsequent gambling behavior. The main objective of the current study was to examine if the level of voluntariness to perform a self-test moderated these key outcomes.

methodParticipants in the study, 1800 new online customers at a leading Swedish gambling company, were randomized to one of three arms: No message (control), up to four messages inviting them to do a self-test, and one message with a mandatory (but technically possible to circumvent) self-test. The interventions were presented when the customer logged in.

resultsThe results showed that 38.9% in the mandatory group and 4.8% in the voluntary group completed the self-test, with indications of a somewhat lower quality of the test by the mandatory group. There was no difference in customer churn or gambling behavior, and only minor differences in use of RG-measures post intervention.

conclusionsWe conclude that presentation format matters and can affect the use and quality of tests: gambling operators should exercise caution when interpreting non-risk assessment results derived solely from self-test tools, particularly mandatory ones, as it can result in inaccurate risk assessments that may mislead duty of care obligations. The balance between achieving high participation and maintaining quality (and thereby meaningfulness) is discussed.

Indexed as

GamblingInternetAdultFemaleHumansMaleMiddle AgedSwedenYoung AdultMandatory Duty-of-carePreventionResponsible gamblingSelf-test

Identifiers

PMID39979952
PMCPMC11843787

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.