This article is available in: HTML PDF jgi: p. 1

Journal Information
Journal ID (publisher-id): jgi
ISSN: 1910-7595
Publisher: Centre for Addiction and Mental Health
Article Information
The Centre for Addiction and Mental Health
Received Day: 14 Month: December Year: 2012
Accepted Day: 14 Month: June Year: 2014
Publication date: October 2014
First Page: 1 Last Page: 10
Publisher Id: jgi.2014.29.3
DOI: 10.4309/jgi.2014.29.3

Is “pop-up” messaging in online slot machine gambling effective as a responsible gambling strategy?
Michael Auer1
Doris Malischnig2
Mark Griffiths3
1neccton, Vienna, Austria
2Österreichische Lotterien GmbH, Vienna, Austria
3Nottingham Trent University, Nottingham, UK
This article was peer-reviewed. All URLs were available at the time of submission.

For correspondence: Michael Auer, neccton, Davidgasse 5, 7052 Muellendorf, Austria. Tel: 0043 650 4783160, E-mail: m.auer
Competing interests: No competing interests.
Ethics approval: Not required for this paper.
Funding: No funding to report.
Contributors: Michael Auer is a PhD student at Nottingham Trent University. For this article, he performed data analysis. He also wrote the principal parts of the article along with Professor Griffiths. Dr. Griffiths is Auer's PhD supervisor and provided input to the data analysis and re-writing of the manuscript. Doris Malischnig is working for the online operator that provided the data for this analysis. She also conceived the idea for this research.
Michael Auer, a director of neccton ltd., is an established expert in gaming and responsible gaming. He is a frequent presenter globally at both universities and responsible gaming conferences. He has published numerous important studies in peer reviewed journals about the effectivenes of responsible gaming features. Michael Auer is also an expert in the developement of software in the field of responsible gaming, and has developed an excellent overview of developments throughout the world in the field. Through work with principal members of the gambling industry Michael Auer remains deeply familiar with the responsible gaming framework.
Doris Malischnig is a qualified clinical psychologist and Head of the Prevention Department at the Casinos Austria/Austrian Lotteries Group. In this capacity, she is responsible for the development, implementation and assessment of responsible gaming training for all staff, as well as for the group-wide appraisal and update of responsible gaming measures and policies, for crisis intervention and for the evaluation of the established preventive measures. Ms. Malischnig is a regular speaker at national and international industry congresses and lectures at all university-level responsible gaming courses in Austria.
Mark Griffiths is a Chartered Psychologist, Professor of Gambling Studies and Director of the International Gaming Research Unit at Nottingham Trent University. He is internationally known for his work on gambling and gaming addictions. Professor Griffiths has published over 450 research papers, three books, more than 120 book chapters and over 1000 other articles. He has also served on numerous national and international committees, among them the British Psychological Society (BPS) Council, the BPS Social Psychology Section, the Society for the Study of Gambling, the Gamblers Anonymous General Services Board and the National Council on Gambling. He is a former National Chair of Gamcare.


Certain gambling operators now provide social responsibility tools to help players gamble more responsibly. One such innovation is the use of pop-up messages that aim to give feedback to the players about the time and money they have thus far spent gambling. Most studies of this innovation have been conducted in laboratory settings, and although controlled studies are indeed more reliable than real-world studies, the non-ecological validity of laboratory studies is still an issue. This study investigated the effects of a slot machine pop-up message in a real gambling environment by comparing the behavioural tracking data of two representative random samples of 400,000 gambling sessions before and after the pop-up message was introduced. The study comprised approximately 200,000 gamblers. The results indicated that, following the viewing of a pop-up message after 1000 consecutive gambles on an online slot machine game, nine times more gamblers ceased their gambling session than did those gamblers who had not viewed the message. The data suggest that pop-up messages can influence a small number of gamblers to cease their playing session, and that pop-ups appear to be another potentially helpful social responsibility tool in reducing excessive play within session.


Certains opérateurs de jeu proposent aujourd'hui des ressources visant à inciter les usagers à jouer de façon plus responsable. Parmi les innovations, on compte les messages flash destinés à indiquer le temps passé à jouer ou l'argent qu'on a dépensé. La plupart des recherches sur le sujet ont été réalisées en laboratoire; même si elles sont plus fiables que les études menées sur le terrain, leur validité écologique reste à déterminer. Nous avons étudié l'effet d'un message flash sur une machine à sous dans un environnement de jeu réel. Nous avons comparé les données sur le comportement recueillies avant et après l'apparition du message à l'écran, auprès de deux échantillons représentatifs aléatoires totalisant 400 000 séances de jeu (environ 200 000 joueurs). Les joueurs qui ont vu un message apparaître au bout de 1000 jeux consécutifs sur une machine à sous en ligne ont été neuf fois plus nombreux à interrompre leur séance de jeu par rapport à ceux qui n'en ont pas reçu. D'après ces résultats, les messages flash inciteraient un petit nombre de joueurs à mettre fin à leur séance de jeu. Ils pourraient ainsi constituer un autre moyen de responsabilisation utile pour réduire le jeu excessif à l'intérieur d'une même séance.


Innovative interactive gambling technologies now provide socially responsible opportunities to support players and to help them control the amount and time and money they spend gambling (Auer & Griffiths, 2013; Griffiths, 2012; Griffiths, Wood, & Parke, 2009). One such innovation is the use of pop-up messages that aim to give feedback to the players about the time and money that they have thus far spent gambling. Doing so allows players to reflect on their immediate gambling and decide if they need a break from their play. However, the question remains as to whether pop-up messages do in fact bring about a substantial effect on gambling behaviour and whether they indeed help players control their gambling.

Slot machine games are associated with problem gambling and are considered potentially dangerous for vulnerable and susceptible players such as minors, problem gamblers, and the intoxicated. Slots players can experience erroneous perceptions of their immediate situation and become dissociated from their immediate actions (Griffiths, Wood, J. Parke, & A. Parke, 2006; Jacobs, 1988). This abandonment of self-control leading to a state of disassociation may lead in turn to those excessive playing sessions that have already been observed in both real-life settings (e.g., Griffiths, 1991) and ecologically valid experiments (e.g., Griffiths, 1994).

Among slot machine players, studies have reported that static informative messages were no more effective in influencing player cognitions than were static warning signs without further informative content (i.e., Monaghan, Blaszczynski, & Nower, 2009; Monaghan & Blaszczynski, 2010). These studies also reported that dynamic messages were recalled more often than were static messages, and that messages encouraging self-appraisal resulted in significantly greater effect on self-reported thoughts and behaviours during gambling. Thus, message content and how that content is displayed both appear to play critical roles in subsequent player behaviour.

Gallagher, Nicki, Otteson, and Elliott (2011) reported that faulty gambling beliefs decreased, in both problem and non-problem video lottery terminal (VLT) gambling gamblers, as a result of exposure to a warning banner. This banner informed players of the randomness of outcomes of VLT games. Wohl, Christie, Matheson, and Anisman (2010) showed that animated educational information on slot machines can be an effective way to increase user adherence to maintain predetermined monetary spending limits. Stewart and Wohl (2013) demonstrated that participants who received a monetary limit pop-up reminder were significantly more likely to adhere to monetary limits than participants who did not. Wohl, Gainsbury, Stewart, and Sztainert (in press) simultaneously investigated two responsible gambling tools that targeted adherence to monetary limits among 72 electronic gaming machine (EGM) gamblers. Those tools comprised an animation-based educational video (used previously by Wohl et al., 2010) and a pop-up message. To investigate the effect of the pop-up window, gamblers were required to set a monetary limit on their gambling; half the participants were informed via a pop-up message when they had reached their limit. The goal of the study was to investigate both the single and additive effects in addition to possible linear or non-linear interactions. Consistent with previous findings, both responsible gaming tools achieved the single effects they were intended to do. More specifically, the findings showed that a pop-up limit reminder helped gamblers stay within their pre-determined monetary limits. However, there was no additive effect, meaning that the adherence to the preset limit did not improve for players who received the pop-up window in addition to the animation-based educational information.

To date, most studies on pop-up messaging have mainly been conducted in laboratory settings, although some research has in fact been conducted in venues (Monaghan, 2008). The present study investigated the effects of a pop-up message among online slot machine players in a real online gambling site. A few studies have obtained data from real-world operators. For instance, Broda et al. (2008) examined the effects of player deposit limits on Internet sports betting from customers of bwin Interactive Entertainment. Overall, the study found that fewer than 1% of the players (0.3%) attempted to exceed their deposit limit. However, Wood and Griffiths (2010) argued that the large mandatory limit may have been the main reason for this finding as Broda et al. (2008) noted that the majority of online gamblers never reached the maximum deposit limit. Though not focusing on interactive messaging, Haefeli, Lischer, and Schwarz (2011) also used data from real-world operators. Their focus was on early warning signs for problem gambling and found out that, to some extent, self-exclusion can be predicted by using information about communication between the player and operator. Given the relatively small empirical base on the effectiveness of pop-up messages from real-world data, this study therefore investigated the effects of a slot machine pop-up message in a real gambling environment.


The authors were given access to a large anonymized dataset by a commercial gambling operator (i.e., win2day). win2day offers Austrian citizens a wide range of games, among them lottery, casino games, and poker, via the online casino and lottery portal of Österreichische Lotterien GmbH and Casinos Austria AG. During the registration process, it is a mandatory requirement that all players set time and cash-in limits. Furthermore, the weekly cash-in limit cannot exceed 800 Euros at any time during and after registration. Following registration, players can voluntarily lower their time and money limits at any time.

In 2011 win2day decided to enhance further their responsible gambling features and introduced pop-up messages (see Figure 1) that are triggered if customers play 1,000 consecutive games on slot machines during a single online gambling session. A gambling session at win2day is initiated when a player logs into their individual account and terminated if the player logs out or closes their web-browser. The pop-up informs players that they have just played 1,000 slot games within a single gambling session. The exact words on the pop-up are “You have now played 1,000 slot games. Do you want to continue? (YES/NO)”. The chosen threshold was the operator's decision and the authors did not have any influence on the operator's pre-set limit. The operator's reason for choosing a threshold of 1,000 slot games was based on the findings of previous studies (i.e., Ladouceur & Sévigny 2009; Schrans, Grace, & Schellink, 2004). Ladouceur and Sévigny (2009) reported that the most effective social responsibility feature was a 60-minute pop-up reminder, which resulted in a decrease in the length of time spent gambling among players. Schrans, Grace, and Schellink (2004) investigated the benefits of a 30-minute pop-up compared to a 60-minute pop-up on VLTs. Schrans et al. found that earlier exposure to pop-up messages during gambling did not influence either the likelihood of reading the message or the choice to stop playing instead of selecting “yes” to continue. A study by Schellink and Schrans (2002; cited in Monaghan, 2008), carried out for the Atlantic Lottery Corporation in Canada, demonstrated that the 60-minute pop-up message was associated among high risk players with a small reduction in session length and a decrease in expenditure.

Technically, it was easier for win2day to track the number of games played rather than the playing time. Given that a typical slot game lasts 3 to 4 seconds, a 1,000 slot games roughly corresponds to a playing time between 50 and 66 minutes. For that reason, win2day chose to display a pop-up message after the playing of 1,000 slot games. Following the message, the player can then decide whether to stop or to continue the session. The pop-up that appears in the centre of the screen (see Figure 1) reminds the player that 1,000 games have been played, and gives the player the option to continue or to stop gambling. The pop-up remains on the screen until the player has pressed “yes” or “no” as to whether he or she wants to continue gambling. If the player presses “yes,” the pop-up message immediately disappears. If the player presses “no,” the game window immediately closes. The size of the pop-up is approximately one-eighth that of the full screen.

To analyze the effect of the recently introduced pop-up message, the authors accessed two representative random samples of 400,000 sessions, one sample each for before and after the pop-up message was introduced. The total dataset consisted of 800,000 game sessions comprising between them approximately 200,000 gamblers. To investigate the effect of the pop-up message on slot machine playing behaviour within single playing sessions, a random sample of 400,000 playing sessions that took place before the introduction of the mandatory pop-up message was compared to 400,000 random sessions after the introduction of the message. It was hypothesized that the introduction of the pop-up message would lead to an increase in gamblers terminating their gambling session after 1000 consecutive plays.


Results showed that approximately 1% of playing sessions before and after the introduction of the slot pop-up message exceeded 1,000 consecutive slot games within a single gambling session. Results also indicated that players who exceeded 1,000 consecutive plays did so twice (on mean average) during the analyzed time period. Therefore, such behaviour was relatively rare among the players of the win2day platform. Without information about the actual intensity of play among this group of gamblers, it can be reliably assumed that a threshold of 1,000 slot games identifies only the most highly involved gamblers.

Of the 400,000 sessions that were sampled before the slot pop-up message was introduced, it was found that 4,220 sessions contained at least 1,000 consecutive plays of the online slot machine. Only five sessions terminated at 1,000 slot games. Of the 400,000 sessions that were sampled following the introduction of the slot pop-up message, 4,205 sessions contained at least 1,000 consecutive plays of the online slot machine. Of these, 45 sessions terminated at 1,000 slot games. The sample was too large to conduct inferential statistics. Figure 2 shows the number of sessions ended by players between 990 and 1,010 consecutive slot machine games before and after the introduction of a pop-up warning message. This result clearly shows no differences except at the 1000th consecutive game when the pop-message was shown.


To date, relatively few studies have collected empirical data relating to the effectiveness of social responsibility tools. This study adds to the sparse empirical base both generally and, in relation to pop-up messaging, more specifically. Previous research has often comprised laboratory studies to investigate the effects of pop-up messages on behavioural and cognitive processes such as belief patterns or dissociative states. Although such work is valid and important, laboratory study samples are typically much smaller than other methods (e.g., surveys and behavioural tracking studies), and behavioural results in laboratory situations can be distorted by the non-ecological validity of artificial settings. Gainsbury and Blaszczynski (2011) concluded that both laboratory and field studies provide valuable contributions to the field, but also observe that caution should be taken in interpreting results. Where possible, they asserted that both methods should be used to verify conclusions. This real-world study, which utilized a real-world sample of 800,000 game sessions, provided much more ecologically-reliable behavioural information on the effectiveness of pop-up messaging while gambling, and is not subject to the recall bias effects of self-report methods.

It cannot be definitively concluded from this study that it was the pop-up message only that had an impact on gamblers stopping after 1000 consecutive plays of the slots game because we can only infer the number of gamblers who saw this message, and did not stop. However, the results obtained appear to show that the introduction of a mandatory pop-up message had an effect in stopping gambling behaviour among a small number of gamblers. More specifically, the results indicated that nine times more gamblers ceased their gambling session, following the viewing of a pop-up message after 1000 consecutive gambles on an online slot machine game, compared to those gamblers who had not viewed a pop-up message. Although the difference was relatively small, it is argued that it was most likely caused by, and was the direct result of, the displaying of a pop-up message after 1000 consecutive plays. The reason for this confidence was that the only peak of that magnitude occurred after the playing of 1,000 consecutive game following the introduction of the pop-up.

There are, of course, major limitations to the data collected. The researchers did not have access to any information about the samples (e.g., age, sex, income, ethnicity, levels of pathology) so it is not known if the two groups differed on any important variables. Another limitation to the study was that it was cross-sectional in design. As such, gamblers were not the same pre- and post- the intervention of the pop-up, and this fact may be a significant limitation for interpretation of the results. Notwithstanding these limitations, the data suggest that pop-up messages can influence a small number of gamblers to cease their playing session, and that pop-ups appear to be another potentially helpful social-responsibility tool in reducing excessive play within session.

Auer, M.. , & Griffiths, M. D. . ( 2013). Voluntary limit setting and player choice in most intense online gamblers An empirical study of gambling behaviour. Journal of Gambling Studies, 29, 647–640.
Broda, A.. , LaPlante, D. A.. , Nelson, S. E.. , LaBrie, R. A.. , Bosworth, L. B.. , & Shaffer, H. J. . ( 2008). Virtual harm reduction efforts for Internet gambling Effects of deposit limits on actual Internet sports gambling behavior. Harm Reduction Journal, 5, 27–36.
Gainsbury, S.. , & Blaszczynski, A. . ( 2011). The appropriateness of using laboratories and student participants in gambling research. Journal of Gambling Studies, 27, 83–97.
Gallagher, T.. , Nicki, R.. , Otteson, A.. , & Elliott, H. . ( 2011). Effects of a video lottery terminal VLT banner on gambling A field study. International Journal of Mental Health and Addiction, 9, 126–133.
Griffiths, M. D. . ( 1991). The observational study of adolescent gambling in UK amusement arcades. Journal of Community and Applied Social Psychology, 1, 309–320.
Griffiths, M. D. . ( 1994). The role of cognitive bias and skill in fruit machine gambling. British Journal of Psychology, 85, 351–369.
doi: 10.1111/j.2044-8295.1994.tb02529.x
Griffiths, M. D. . ( 2012). Internet gambling, player protection and social responsibility. In Williams, R. , Wood, R. , & Parke, J. (Eds.), Routledge Handbook of Internet Gambling (pp. 227–249). London:Routledge.
Griffiths, M. D.. , Wood, R. T. A.. , & Parke, J. . ( 2009). Social responsibility tools in online gambling A survey of attitudes and behavior among Internet gamblers. CyberPsychology and Behavior, 12, 413–421.
doi: 10.1089/cpb.2009.0062
Griffiths, M. D.. , Wood, R. T. A.. , Parke, J.. , & Parke, A. . ( 2006). Dissociative states in problem gambling. In Allcock, C. (Ed.), Current Issues Related To Dissociation (pp. 27–37). Melbourne:Australian Gaming Council.
Haefeli, J.. , Lischer, S.. , & Schwarz, J. . ( 2011). Early detection items and responsible gambling features for online gambling. International Gambling Studies, 11, 273–288.
doi: 10.1080/14459795.2011.604643
Jacobs, D. F. . ( 1988). Evidence for a common dissociativelike reaction among addicts. Journal of Gambling Behavior, 4, 27–37.
Ladouceur, R.. , & Sévigny, S. . ( 2009). Electronic gambling machines Influence of a clock, a cash display, and a precommitment on gambling time. Journal of Gambling Issues, 23, 31–41.
doi: 10.4309/jgi.2009.23.2
Monaghan, S. M. . ( 2008). Review of popup messages on electronic gaming machines as a proposed responsible gambling strategy. International Journal of Mental Health and Addiction, 6, 214–222.
doi: 10.1007/s11469-007-9133-1
Monaghan, S. M.. , Blaszczynski, A.. , & Nower, L. . ( 2009). Do warning signs on electronic gaming machines influence irrational cognitions? Psychological Reports, 105, 173–187.
Monaghan, S. M.. , & Blaszczynski, A. . ( 2010). Impact of mode of display and message content of responsible gaming signs for electronic gaming machines on regular gamblers. Journal of Gambling Studies, 26, 67–88.
doi: 10.1007/s10899-009-9150-z
Stewart, M. J.. , & Wohl, M. J. A. . ( 2013). Popup messages, dissociation, and craving How monetary limit reminders facilitate adherence in a session of slot machine gambling. Psychology of Addictive Behaviors, 27, 268–273.
doi: 10.1037/a0029882
Schellink, T.. , & Schrans, T. . ( 2002) Atlantic Lottery Corporation Video Lottery Responsible Gaming Feature Research: Final Report. Halifax, NS. Focal Research Consultants.
Schrans, T.. , Grace, J.. , & Schellink, T. . ( 2004). 2003 Nova Scotia Video Lottery Responsible Gaming Features Evaluation: Final Report.Halifax, NS. Focal Research Consultants.
Wohl M., J.. , Christie, K. L.. , Matheson, K.. , & Anisman, H. . ( 2010). Animationbased education as a gambling prevention tool Correcting erroneous cognitions and reducing the frequency of exceeding limits among slots players. Journal of Gambling Studies, 26, 469–486.
doi: 10.1007/s10899-009-9155-7
Wohl, M. J.. , Gainsbury, S.. , Stewart, M. J.. , & Sztainert, T. . ( 2013). Facilitating responsible gambling The relative effectiveness of educationbased animation and monetary limit setting popup messages among electronic gaming machine players. Journal of Gambling Studies, 29, 703–717.
doi: 10.1007/s10899-012-9340-y
Wood, R. T. A.. , & Griffiths, M. D. . ( 2010). Social responsibility in online gambling Voluntary limit setting. World Online Gambling Law Report, 9(11), 10–11.
doi: 10.1007/s10899-012-9332-y

Click for larger image

Figure 1: 

View of the “pop-up” message that appears after the playing of 1,000 consecutive games on slot machines

Click for larger image

Figure 2: 

Number of sessions ended between 990 and 1,010 slot games before and after the introduction of a pop-up warning message

Article Categories:
  • Research Articles

Related Article(s):

Copyright © 2020 | Centre for Addiction and Mental Health
Editor-in-chief: Nigel E. Turner, Ph.D.
Managing Editor: Vivien Rekkas, Ph.D. (contact)