Impact

Ig Nobel Aside, Our Gambling Research Was No Croc Impact
Researcher Nancy Greer and Prof Matthew Rockloff were suitably dressed for the Ig Nobel prize ceremony

Ig Nobel Aside, Our Gambling Research Was No Croc

September 19, 2017 2758

Croc gambling study authors_opt

Researcher Nancy Greer and Prof Matthew Rockloff were suitably dressed for the Ig Nobel prize ceremony

Our research examining the effects of holding a live crocodile on slot-machine gambling has won one of this year’s infamous Ig Nobel prizes.

The award was one of several presented at a ceremony at Harvard University in the U.S. on Thursday night. The Ig Nobels honor research topics that “first make people laugh, then make people think.” They’re often regarded as a parody of the Nobel Prizes.

The judges said to all those who didn’t win an award, “better luck next year” and repeated the same to the recipients.

Our original research paper, “Never Smile at a Crocodile: Betting on Electronic Gaming Machines is Intensified by Reptile-Induced Arousal,” published in the Journal of Gambling Studies in 2010, did get some coverage at the time.

The Conversation logo

This article by Matthew Rockloff and Nancy Greer originally appeared at The Conversation, a Social Science Space partner site, under the title “Snap that prize up: croc research on gambling habits gets an Ig Nobel”

Now that our work has been awarded the 2017 Ig Nobel prize for Economics, does it mean the influence of emotions on people’s gambling may get more attention in the literature?

Frankly, probably not. People will laugh a little, and carry on with their lives.

The croc research
But the research addressed a surprisingly serious topic of how gambling is affected by the excitement generated by pokies (video poker machines) or slot machines.

One of the important entertainment elements of gambling is its ability to generate excitement. This excitement is particularly important for people with pre-existing gambling problems, who often suffer from low moods.

The research was devised to subtly manipulate excitement just prior to gambling.

Our supposition was that some of the excitement from holding the crocodile would be misattributed to the gambling experience, allowing us to study how that feeling of excitement might influence gambling decisions.

So we attended 100 crocodile tours at the Koorana Crocodile Farm in Coowonga, Central Queensland, Australia. For about half of the tours, we approached people at random to play a simulated pokie game before entering the farm and having any contact with crocodiles.

For the other half of participants, they were approached immediately after holding a live one-metre crocodile. Photos holding the crocodile are a feature of the end of the tour, and most tourists take a turn holding this ancient – and potentially deadly – animal.

We measured all aspects of people’s real-money gambling on our simulated pokie game. We also took standard measures of people’s physiological state and mood, and surveyed them for any pre-existing gambling problems.

The findings
Most of our subjects, the tourists at the croc farm, had fun holding the croc. The juvenile crocodile had its mouth taped shut, but still had sharp teeth protruding from its mouth.

It also had sharp claws, and tourists were advised to handle it carefully. In our debriefing of the participants, nobody indicated an awareness that the crocodile had any influence on their gambling decisions.

But our results showed that people with pre-existing problems bet larger amounts after they held a one-metre crocodile, as long as they did not rate themselves as having a negative mood.

In contrast, gamblers with pre-existing problems who were in a negative mood bet substantially less. This demonstrated that emotions are an important determinant of gambling choices.

The research used a paradigm consistent with experimental realism, in which the goal was to simulate the psychological processes involved in real-world gambling rather than to simulate the mundane realism of the casino environment.

Experimental research often sacrifices some features of realism to improve control. Later correlational research supports our result by showing that people generally bet more in large, and presumably more exciting, casino environments than in smaller local venues.

Ig Nobel recognition of the research
Great science and great humour are often based on a surprise or unexpected results. It is important for people to understand that not all research has to be stuffy to be valuable.

Public recognition for our research through the Ig Nobels may allow people to “laugh,” but also to “think.” People need to be more aware of how their emotional states can influence their gambling decisions so that they can make better gambling choices.

The crocodile study was actually completed 10 years ago, and we have made great progress since in understanding gambling choices. Our more recent research looks at gambling harms and benefits, with the purpose of trying to identify what amount of gambling is “too much.”

Many people participate in gambling with measurable recreational benefits. The key to engaging successfully with gambling products, including slots, is to maximize the benefit and minimize the harms.

One of our new research platforms to examine this and other questions is a customised Luck Lolly Slots slot machine game available from iOS and Android app stores. It’s been developed by CQUniversity for a research project investigating pokie-style mobile apps and is available for free (with no in-app purchases and no ads).

The ConversationAs for the Ig Nobel prize, it includes a cash award of 10 trillion Zimbabwe dollars. This will soon be spent by the research team on necessary supplies: two cups of coffee at Dunkin’ Donuts (medium, no milk).


Matthew Rockloff, a psychologist, is the head of the Population Research Laboratory at CQUniversity. Nancy Greer, a researcher for CQUniversity’s Experimental Gambling Research Laboratory, is completing a PhD with CQUniversity examining e-sports betting and skin gambling.

View all posts by Matthew Rockloff and Nancy Greer

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I couldn’t help but smile while reading this article! It’s refreshing to see researchers with a sense of humor and the ability to find a playful side in their work. The Ig Nobel Prize is, after all, a celebration of quirky and offbeat scientific achievements, and your gambling research certainly fits the bill. While the study may have involved crocodiles, a far cry from traditional human subjects in gambling research, it highlights the creativity and diversity of scientific inquiry. Sometimes, unconventional approaches lead to unexpected insights and valuable perspectives that can be applied to other fields. The fact that your… Read more »