Journal of Gambling Studies

, Volume 31, Issue 4, pp 1505–1514

Jackpot Expiry: An Experimental Investigation of a New EGM Player-Protection Feature

  • Matthew J. Rockloff
  • Phillip Donaldson
  • Matthew Browne
Original Paper


Given the evidence for the motivating influence of electronic gaming machines (EGM) jackpots on intensifying player behaviour (Rockloff and Hing in J Gambl Stud 1–7, 2013), there is good reason to explore consumer-protection features. Jackpot Expiry is a potential feature of a mandatory pre-commitment system or player identification system (e.g., loyalty program) whereby the availability of jackpots expires after a fixed interval of play. One hundred and thirty volunteers (males = 56, females = 74) played a laptop-simulated EGM with a starting $20 real-money stake. In the test condition, players were shown a “relevant” message stating that the promised jackpot had expired and could no longer be won by the participant (after the 20th trial). In the irrelevant message condition a similar pop-up message simply said to push the button to continue. Lastly, a control condition had no pop-up message about the jackpot expiring. The results showed that betting speeds (one indicator of gambling intensity) were significantly slowed by the relevant ‘expiry’ message. Most importantly, all wagers past the 20th trial were programmed as losses. Player receiving the ‘expiry’ message for a cash jackpot quit with significantly more money remaining on the machine. Therefore, jackpot expiry was effective in limiting player losses, while there was no evidence that jackpot expiry reduced self-rated player enjoyment of the simulated EGM experience.


EGM Jackpot Poker Pokie Slot Fruit 


  1. DelFabbro, P. (2008). Evaluating the effectiveness of a limited reduction in electronic gaming machine availability on perceived gambling behaviour and objective expenditure. International Gambling Studies, 8(2), 151–165. doi:10.1080/14459790802139983.CrossRefGoogle Scholar
  2. Department of Internal Affairs (New Zealand). (2011). Guidelines in relation to harm prevention and minimisation.
  3. Ernkvist, M. (2009). Creating player appeal: Management of technological innovation and changing pattern of industrial leadership in the U.S. gaming machine manufacturing industry, 1965–2005. Gotenberg: University of Gothenburg.Google Scholar
  4. Ferris, J., & Wynne, H. (2001). The Canadian problem gambling index. Ottawa, ON: Canadian Centre on Substance Abuse.Google Scholar
  5. Haruvy, E., Erev, I., & Sonsino, D. (2001). The medium prizes paradox: Evidence from a simulated casino. Journal of Risk and Uncertainty, 22(3), 251–261.Google Scholar
  6. Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263.CrossRefGoogle Scholar
  7. New South Wales Gaming Machines Regulation. (2010). REG 30.
  8. Productivity Commission. (2010). Gambling. Productivity Commission inquiry report, Vol. 1. Report no. 50. Canberra: Productivity commission.
  9. Rockloff, M., Ehrich, J., Themessl-Huber, M., & Evans, L. (2011). Validation of a one item screen for problem gambling. Journal of Gambling Studies, 1–7. doi:10.1007/s10899-010-9232-y.
  10. Rockloff, M. J., & Hing, N. (2013). The impact of jackpots on EGM gambling behavior: A review. Journal of Gambling Studies, 29(4), 775–790.Google Scholar
  11. Schull, N. D. (2005). Digital gambling: The coincidence of desire and design. The ANNALS of the American Academy of Political and Social Science, 597(1), 65–81. doi:10.1177/0002716204270435.CrossRefGoogle Scholar
  12. Turner, N. E. (2011). Volatility, house edge and prize structure of gambling games. Journal of Gambling Studies, 27(4), 607–623. doi:10.1007/s10899-011-9238-0.CrossRefPubMedGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Matthew J. Rockloff
    • 1
  • Phillip Donaldson
    • 1
  • Matthew Browne
    • 1
  1. 1.Institute for Health and Social Science ResearchCentral Queensland UniversityBundabergAustralia

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