Home » News » Study Finds More Casinos May Equal Fewer Gamblers

Study Finds More Casinos May Equal Fewer Gamblers

A new study discovers residential gambling is not tied to the number of casinos in the state – a finding that may relieve fears of an epidemic of gambling addiction.

University of Iowa researchers examined how casino growth in the state has influenced gambling by residents. The surprising results of their survey suggests that fewer Iowans gambled overall and also that fewer people have become addicted to gambling despite a recent spurt in gaming facilities.

Casino gambling was introduced in Iowa in 1991. There are currently 21 casinos in Iowa, all but three licensed by the state. (The others are owned and operated by Native American tribes.)

The findings could affect expansion plans by casino operators and may influence how policymakers in Iowa, who must approve new casinos, view adding more gaming facilities, said Donald Black, M.D., a psychiatry professor at UI who has been studying gamblers and gambling habits since the late 1990s.

“It seems society reaches a saturation point beyond which additional gambling opportunities won’t capture more people,” said Black, whose study was published in the journal Annals of Clinical Psychiatry.

“And that applies to problem gamblers, too. They all seem to adjust to it.”

In the study, researchers surveyed 356 residents in eastern Iowa 18 years of age and older about their gambling activity.

The respondents were slotted according to the South Oaks Gambling Screen (SOGS), a well- known measure that ranks gambling behavior on a five-point scale, from no problems to addiction.

Black and his colleagues compared the results to similar surveys done in 1995 and 1989. Remarkably, the researchers discovered the percentage of people who didn’t gamble had risen to 83 percent in the most recent survey, versus 72 percent in the 1995 poll.

Moreover, the percentage of non-gamblers in the latest survey was nearly as high as the 86 percent of Iowans who reported not gambling in the 1989 poll — before any casinos had been built in the state.

The prevalence of addicted gamblers — those with the highest ranking on the SOGS scale — also dropped in the most recent survey, from nearly 2 percent of respondents in the 1995 survey to 1.4 percent in the latest poll.

Researchers believe this finding is salient as the number of casinos has doubled — from 10 in 1995 (including three racetracks that added slots that year) to 21 currently.

Still, the number of self-reported gambling addicts was far higher than the 0.1 percent who claimed a gambling addiction in 1989.

That suggests “casinos have had a great impact (on problem gamblers),” Black notes, “but it has stabilized.”

This hypothesis is supported by the percentage of residents who say they gamble occasionally (ranked 1 or 2 on the SOGS scale), which has dropped to 14 percent in the latest survey from 23 percent in the 1995 survey.

Black adds that the results, although limited to Iowa, should hold true elsewhere.

He said the findings substantiate a theory, championed by Dr. Howard Shaffer, a psychologist at Harvard Medical School, who looked at the impact of gambling in casino-rich Nevada and found that the number of people addicted to gambling was not disproportionately higher than other states.

Black likens the public’s fascination with casinos as a child with a new toy. Sure, it’s interesting at first, but at some point “it’s lost its novelty,” he says.

Source: University of Iowa Study Finds More Casinos May Equal Fewer Gamblers

Man gambling photo by shutterstock.

Study Finds More Casinos May Equal Fewer Gamblers

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2018). Study Finds More Casinos May Equal Fewer Gamblers. Psych Central. Retrieved on October 1, 2020, from
Scientifically Reviewed
Last updated: 8 Aug 2018 (Originally: 17 Dec 2012)
Last reviewed: By a member of our scientific advisory board on 8 Aug 2018
Published on Psych All rights reserved.