What People Know About Gambling May Cut Both Ways, Review Finds

A systematic review published in the International Journal of Mental Health and Addiction reports that gambling-related knowledge, long treated as a cornerstone of understanding gambling behavior, has been defined and measured so inconsistently across studies that no consensus conceptualization or standardized assessment approach exists. The review, led by Alexander J. Connolly and Joshua B. Grubbs with colleagues, followed PRISMA guidelines and searched PsycINFO, PubMed, and Web of Science to identify studies examining how gambling knowledge has been conceptualized and assessed, and how it relates to gambling outcomes.

The scope of the reviewed literature was broad in age but narrow in setting. No age restrictions were applied, so included studies ranged from children and adolescents to adults. Despite this range, the majority of the studies drew on secondary school and university student samples, a detail the authors highlight as a limitation on how far conclusions can extend to the general gambling population.

The central finding concerns heterogeneity. Across the identified studies, gambling knowledge was operationalized in substantially different ways, and the review found no standardized instrument or shared definition. This matters because knowledge about gambling is often assumed to be central to behavior, particularly in forms of gambling perceived as skill-based, where players may believe that knowing the game translates into controlling it.

The most consequential result is that the association between knowledge and gambling outcomes varied depending on the operationalization used. Some forms of knowledge appeared protective, while others were associated with increased gambling risk. In other words, the review does not support a simple claim that more knowledge leads to safer gambling or that ignorance drives harm; the direction of the relationship depends on how knowledge itself is defined and measured in each study.

This pattern has a methodological explanation. When one study counts awareness of odds as knowledge, another counts understanding of house advantage, and a third counts familiarity with game rules, the resulting associations with gambling frequency, spending, or problem severity cannot be pooled into a single conclusion. The review’s authors conclude that inconsistent conceptualization and measurement limit conclusions regarding the role of gambling knowledge in gambling behavior.

The clinical implications follow directly from that limitation. If screening tools, prevention programs, and interventions are built on measures of gambling knowledge that lack a shared definition, their effectiveness is difficult to compare across settings. The authors argue that developing clearer and more objective measures may improve future research, screening, prevention, and intervention efforts.

For clinicians, the practical takeaway is caution rather than a new protocol. The review does not establish that any particular educational approach reduces gambling harm, and it does not report intervention efficacy data. What it establishes is that the field’s evidence base on knowledge is fragmented, and that claims about knowledge as a protective factor should be qualified by the measure used to capture it.

For researchers, the review functions as a map of the problem. The heterogeneity in definitions and measures means that findings from different studies are not directly comparable, and the variation in outcomes, protective in some operationalizations and risk-elevating in others, suggests that knowledge is not a single construct. Future work will need to decide what gambling knowledge actually refers to before testing whether changing it changes behavior.

The review is published as an original article in 2026, with the full text available to subscribers through the journal. Its abstract states the core conclusion plainly: without clearer and more objective measures, the field cannot yet say with confidence what role knowledge plays in gambling behavior, and the promise of knowledge-based prevention and intervention remains untested rather than demonstrated.

Subject of Research: How gambling-related knowledge is conceptualized and measured, and its associations with gambling outcomes

Article Title: Gambling-Related Knowledge: A Systematic Review and Clinical Implications

Article References: Connolly, A. J., Stall, L. M., Mick-Keck, T., Montoya, A., Scowden, J., Campbell, L., Barragan, H., Kopatz, B., & Grubbs, J. B. (2026). Gambling-Related Knowledge: A Systematic Review and Clinical Implications. International Journal of Mental Health and Addiction. https://doi.org/10.1007/s11469-026-01756-7

Image Credits: AI Generated

DOI: 10.1007/s11469-026-01756-7

Keywords: gambling, systematic review, gambling-related knowledge, measurement heterogeneity, PRISMA, problem gambling, prevention, screening, skill-based gambling, research methods, Gambling-Related, Knowledge