Evidence map›Paper›PMID 40302118›Full record

ArticleAddiction (Abingdon, England)2025

Sludge, dark patterns and dark nudges: A taxonomy of online gambling platforms' deceptive design features.

Philip Newall

Abstract read
In one paragraph

Article in Addiction (Abingdon, England), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing 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

10 citing papers in PubMed.

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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

1 author.

Philip NewallSchool of Psychological Science, University of Bristol, Bristol, UK.ORCID https://orcid.org/0000-0002-1660-9254

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGambling research has highlighted various aspects of deceptive design. For example, land-based casinos are physically designed to encourage people to gamble there for longer. Similarly, various electronic gambling products, such as electronic gaming machines, exhibit "structural characteristics" that likely encourage people to continue using them. Here I argue that the deceptive design of online gambling platforms is an important yet relatively neglected topic, representing the digital equivalent of land-based gambling venue design. This topic's importance is underscored by online gambling's international growth. ARGUMENT: Online gambling platforms' deceptive design features can be categorized using three terms from the interdisciplinary field of behavioral science. "Sludge" refers to detrimental frictions, which feature for example in online gambling platforms' withdrawal processes. "Dark patterns" refers to deceptive user-interface design more broadly, which includes sludge-based features and other design features such as high suggested deposit/bet sizes. Finally, "dark nudges" refers to all of these as well as other aspects of deceptive design, such as presenting gambling as a fun activity.

conclusionsThe complexity of online gambling platforms poses challenges for researchers, to understand what effects various design features have on behavior, and also for policymakers, to ensure fairer outcomes for people. Increased awareness and collaboration are needed from many stakeholders to better understand deceptive design features' behavioral impacts and to give them the appropriate regulatory attention in comparison to other determinants of harm.

Indexed as

DeceptionGamblingInternetUser-Computer InterfaceHumansbehavioral sciencebehavior changedeceptive choice architecturegambling platformsnudgeonline gambling

Identifiers

PMID40302118
PMCPMC12426356

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.