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Shirty money: A brief look at football’s relationship with the gambling industry
A couple of days ago, Simon Stevens, the Chief Executive of the British National Health Service (NHS) said that foreign-owned betting companies who sponsor British football clubs should financially contribute to paying for gambling addicts’ treatment. I am all in favour of this, although I think some money should also be allocated to education, prevention, and (predictably) research. This is also an area that I have written about recently.
More specifically, I and my colleague Dr. Hibai Lopez-Gonzalez published a paper earlier this year entitled ‘Betting, forex trading, and fantasy gaming sponsorships – A responsible marketing inquiry into the ‘gamblification’ of English football’ in the International Journal of Mental Health and Addiction. Using data about sponsorship deals from English Football Premier League, we demonstrated that gambling marketing has become firmly embedded in the financial practices of many Premiership football clubs. We argued that these associations are not trivial, and that the symbolic linkage of sport and newer gambling forms may become an issue of public health, especially affecting vulnerable groups such as minors and problem gamblers.
A major preoccupation regarding gambling intersection with sports has been the marketing of betting as an experience inherently associated with the symbolic culture of sport. By emphasising its connections with sports, the marketing and advertising of betting has been theorised to pursue the ‘sanitation’ of gambling, transferring the health-related symbolic attributes of sport and physical exercise to betting behaviour. In this regard, of great concern is the effects that an excessive volume of betting marketing might have on vulnerable groups such as minors and young adults and individuals suffering or recovering from gambling disorder. Furthermore, additional issues might arise in the event that those new categories that extend the definition of sports gambling (i.e., trading, other gambling forms such as poker, and fantasy games) seeking to market their products in alignment with (or appropriation of) sports’ core values and positive attributes. Early examples of this marketing strategy can be found in the sport stars’ endorsement of poker brands such as the footballers Neymar Jr. and Cristiano Ronaldo, and the tennis player Rafael Nadal.
We asserted in our paper that football shirt sponsorship is arguably a good proxy to calibrate the volume of gambling marketing in English football. Table 1 shows the shirt sponsor evolution over a decade (from the 2007/2008 to 2016-2017 seasons). First team shirt sponsorship with gambling companies evolved from four deals in 2008, six deals in 2012, to ten deals in 2017, accounting for half of the 20 English Premier League teams. The saturation of shirt logos owned by gambling brands has evolved rapidly over a relatively short period of time. However, some industry voices have been anticipating a decline in the numbers of shirts being sponsored by gambling firms due to their incapacity to compete with other business sector, although such a decline has yet to materialise.
In the same vein, it has been noted that most of the football teams with shirts sponsored by gambling companies are among the less powerful in the league, both in terms of economic profitability and sporting success. Analysing the data from end of season table positions indeed demonstrates a bias of gambling companies sponsoring teams towards the bottom of the table. Thus, the four teams (out of 20 in the English Premier League) with gambling logos in 2007/08 finished the league 6th, 7th, 11th, and 15th. In 2011-12, the six teams sponsored by gambling companies finished 10th, 11th, 13th, 16th, 18th, and 20th. In 2016/2017 season, the ten teams with gambling sponsors showed an almost perfect inverse correlation between table position and gambling-origin shirt sponsor, ranking 9th, 10th, 11th, 13th, 14th, 15th, 16th, 17th, 18th, and 20th (19th being a money loan company).
This could be interpreted as a nuanced strategy. More specifically, gambling operators might believe they have enough global exposure that the league as whole offers, without needing to pay premium sponsorship deals to attach their brand to the most supported and successful teams (because all the lower ranked teams have to play all the upper ranked teams and therefore get equal advertising exposure during televised games).
Table 2 shows the breadth of the gamblification process by focusing on sponsorship deals running through 2016-17 season in the English Premier League. As can be observed, all teams secured at least one official betting partner, with some of them having multiple partners due to regional deals in strategic markets to provide so-called ‘geo-targeted’ betting experience. An illustration example is Arsenal club’s deals with 12Bet company in Asia, Betfair in Europe, SportPesa in Kenya, and Tempobet in Oceania. Altogether, the 20 English Premier League teams totalled 20 different betting brands, with 12 brands sponsoring only one team, five brands sponsoring two teams, and three brands sponsoring three different teams. Despite how fragmented the betting market might look, these brands represent only a small fraction of the actual number operating in association with the English football. In fact, betting brands are generally considered to offer poorly differentiated products in highly competitive markets. Consequently, marketing plays a significant part in artificially creating singular attributes that facilitate the acquisition and maintenance of customers.
Sponsorship deals with trading companies are not as prevalent as betting sponsorships. However, 14 out of 20 English Premier League teams have linked partnership deals with trading companies – most notably forex trading – for 2016/17 season. Only one trader (EZTrader) sponsors two different teams, while the rest are unique sponsors. Arguably, the same betting market attributes of low product differentiation and competitive environment also applies to trading firms.
Fantasy gaming is rapidly becoming a large component of sports appreciation, especially in the USA where fantasy sports appears to have partially absorbed the consumer base for online sports betting, an illegal activity in most states. Although still in its infancy in Europe, eight out of 20 English teams already have agreements in place with fantasy sports companies, some of which include a deal with DraftKings, the leading company along with FanDuel in USA’s fantasy gaming market. The concentration of brands here is slightly higher than in the case of betting and trading sponsorships, but six different brands still populate the growing fantasy gaming market in the English Premier League.
The detrimental effect on public health of an increase in the sports betting marketing volume is difficult to demonstrate. British data collected by the Gambling Commission is inconclusive due to the lack of definition of what constitutes gambling on sports. In general, research has found difficult to substantiate the causal association between gambling advertising exposure and behaviour, particularly when the effects of such exposure might take place weeks or months later. Despite the difficulties of finding empirical evidence of the real impact of marketing on betting behaviour, many authors have acknowledged that the association between marketing and gambling disorder is plausible, at least theoretically.
The sports betting marketing and advertising growth could be theorised to have two effects. First, an increase in gambling advertising exposure will lead to a higher prevalence rate of problem gambling. Many scholars have indicated that problem gamblers are usually more exposed to advertising (e.g., they visit more frequently gambling websites or watch more sport events), therefore it cannot be established whether they gamble more because they are exposed to more marketing instances or the are more exposed because they gamble more. However, a study I published with my Norwegian colleagues at the University of Bergen conducted among 6,034 Norwegian gamblers found that problem gamblers had a greater involvement with gambling advertising even when they were similarly exposed than regular non-problem gamblers.
Second, an overall rise in the consumption of gambling products following more aggressive marketing strategies, even while maintaining stable the percentage of people experiencing gambling-related harm, would lead to a rise in absolute numbers of people developing gambling problems. Simply put, keeping problem gambling rate constant, the more people that bet on sports, the more problem gamblers.
There is a wide consensus that sports betting marketing (and advertising) must be regulated, and is the case in most jurisdictions including the UK. However, there is no specific protection concerning the marketing of trading and fantasy gaming as a specific product category associated with sports. Finally, our paper noted that although there is no scientific evidence the marketing agreements between football clubs and the gambling industry are actually having a detrimental effect on the aforementioned vulnerable groups, it makes theoretical sense to think that they might potentially cause harm.
Note: This article was co-written with Hibai Lopez-Gonzalez
Dr. Mark Griffiths, Professor of Behavioural Addiction, International Gaming Research Unit, Nottingham Trent University, Nottingham, UK
Further reading
Griffiths, M.D., Estévez, A., Guerrero-Solé F. & Lopez-Gonzalez, H. (2018). A brief overview of online sports betting advertising and marketing. Casino and Gaming International, 33, 51-55.
Lopez-Gonzalez, H., Estévez, A. & Griffiths, M.D. (2017). Marketing and advertising online sports betting: A problem gambling perspective. Journal of Sport and Social Issues, 41, 256-272.
Lopez-Gonzalez, H., Estévez, A. & Griffiths, M.D. (2018). Controlling the illusion of control: A grounded theory of sports betting advertising in the UK. International Gambling Studies, 18, 39-55.
Lopez-Gonzalez, H. & Griffiths, M.D. (2016). Is European online gambling regulation adequately addressing in-play betting advertising? Gaming Law Review and Economics, 20, 495-503.
Lopez-Gonzalez, H. & Griffiths, M.D. (2018). Betting, forex trading, and fantasy gaming sponsorships – A responsible marketing inquiry into the ‘gamblification’ of English football. International Journal of Mental Health and Addiction, 16, 404-419.
Lopez-Gonzalez, H. & Griffiths, M.D. (2018). Understanding the convergence of online sports betting markets. International Review for the Sociology of Sport, in press.
Lopez-Gonzalez, H. Guerrero-Solé, F., Estévez, A. & Griffiths, M.D. (2018). Betting is loving and bettors are predators: A Conceptual Metaphor Approach to online sports betting advertising. Journal of Gambling Studies, in press.
Lopez-Gonzalez, H., Guerrero-Sole, F. & Griffiths, M.D. (2018). A content analysis of how ‘normal’ sports betting behaviour is represented in gambling advertising. Addiction Research and Theory, 26, 238-247.
It takes all sports: A brief look at sport-related betting
Over the past year I have been carrying out research with my Spanish colleague – Dr. Hibai Lopez-Gonzalez – into problematic sports betting and sports betting advertising which has already produced a number of papers (see ‘Further reading’ below) and with many more to come. One of the issues we have faced in contextualising our work is that there is no such concept as sport-related problem gambling in prevalence surveys because problem gambling is assessed on the totality of gambling experiences rather than a single activity. For instance, in the three British Gambling Prevalence Surveys (BGPSs) conducted since 1999, sport-related gambling is subsumed within a number of different gambling forms: ‘football pools and fixed odds coupons’, ‘private betting’, and ‘other events with a bookmaker’. The 2010 BGPS (which I co-authored) included ‘sports betting’ as a category, along with ‘football pools’ (no coupons), ‘private betting’, ‘spread betting’ (which can include both sports or financial trading). In addition, the 2010 BGPS added a new category under online gambling activities to include ‘any online betting’. More recently, the Health Survey for England also introduced a new category: ‘gambling on sports events (not online)’.
Despite these limitations, some evidence can be inferred from gambling activity by gambling type. In 2014, Heather Wardle and her colleagues combined the gambling data from the Health Survey for England and the Scottish Health Survey. They reported that among adult males aged 16 years and over during a 12-month period, 5% participated in offline football pools, 8% engaged in online betting (although no indication was made about whether this only involved sport), and 8% engaged in sports events (not online). The categories were not mutually exclusive so an overlapping of respondents across categories was very likely. A similar rate was found in South Australia in a 2013 report the Social Research Centre with those betting on sports over the past year accounting for 6.1% of the adult population, an increase from the 4.2% reported in 2005.
In Spain, the Spanish Gambling Commission (Direccion General de Ordenacion del Juego [DGOJ] reported that 1.5% of the adult (male and female) population had gambled online on sports in 2015. This is a significantly lower proportion compared with the British data, although the methodological variations cannot be underestimated. Spanish data also shows that, among those who have gambled online on a single gambling type only, betting on sports is the more prevalent form with up to 66% of those adults.
In France, the data on the topic only focuses on those who gamble rather than examining the general population of gamblers and non-gamblers. Among online gamblers, Dr. Jean-Michel Costes and colleagues reported in a 2011 issue of the journal Tendances that 35.1% had bet on sports during the last 12 months. In another French study by Costes and colleagues published in a 2016 issue of the Journal of Gambling Studies, sports betting represented 16.4% of the gambling cohort, although again, the representativeness of sports betting behaviour among the general gambling and non-gambling population could not be determined.
Due to the aforementioned shortcomings in the definition of sport-related gambling, there is only fragmented empirical evidence concerning the impact of sports-related problem gambling behaviour. For instance, in 2014, Dr. Nerilee Hing noted that clinical reports indicate that treatment seeking for sports-related problem gambling had grown in Australia. In British Columbia (Canada), a 2014 survey by Malatests & Associates for the Ministry of Finance reported that 23.6% of at-risk or problem gamblers had gambled on sports either offline or online. A smaller proportion (16.2%) was found in the Spanish population screened in the national gambling DGOJ survey, except this subgroup was entirely composed of online bettors.
In a 2011 study published in International Gambling Studies with patients from a pathological gambling unit within a community hospital in Barcelona, Dr. Susana Jiménez-Murcia and her colleagues found that among those who had developed the disorder gambling online only (as opposed to those who gamble both online/offline or offline only), just over half (50.8%) were sport bettors. Those who gambled online only (on any activity) and those that only gambled online on sports events represented a small minority of the total number of problem gamblers. Overall, there is relatively little research on this sub-group of gamblers therefore I and others will be monitoring the evolution of this trend as the online gambling population grows.
(Note: This blog was co-written with input from Dr. Hibai Lopez-Gonzalez).
Dr. Mark Griffiths, Professor of Behavioural Addiction, International Gaming Research Unit, Nottingham Trent University, Nottingham, UK
Further reading
Costes, J-M, Kairouz, S., Eroukmanoff, V., et al. (2016) Gambling patterns and problems of gamblers on licensed and unlicensed sites in France. Journal of Gambling Studies 32(1), 79–91.
Costes, J., Pousset, M., Eroukmanoff, V., et al. (2010). Gambling prevalence and practices in France in 2010. Tendances, 77, 1–8.
DGOJ (2016a) Análisis del perfil del jugador online. Madrid: Ministerio de Hacienda y Administraciones Públicas.
DGOJ (2016b) Estudio sobre prevalencia, comportamiento y características de los usuarios de juegos de azar en España 2015. Madrid: Ministerio de Hacienda y Administraciones Públicas.
Hing, N. (2014) Sports betting and advertising (AGRC Discussion Paper No. 4). Melbourne: Australian Gambling Research Centre.
Jiménez-Murcia S, Stinchfield R, Fernández-Aranda F, et al. (2011) Are online pathological gamblers different from non-online pathological gamblers on demographics, gambling problem severity, psychopathology and personality characteristics? International Gambling Studies 11(3), 325–337.
Lopez-Gonzalez, H., Estevez, A. & Griffiths, M.D. (2017). Marketing and advertising online sports betting: A problem gambling perspective. Journal of Sport and Social Issues, in press.
Lopez-Gonzalez, H. & Griffiths, M.D. (2016). Is European online gambling regulation adequately addressing in-play betting advertising? Gaming Law Review and Economics, 20, 495-503.
Lopez-Gonzalez, H. & Griffiths, M.D. (2017). Understanding the convergence of online sports betting markets. International Review for the Sociology of Sport, in press.
Lopez-Gonzalez, H. & Griffiths, M.D. (2017). ‘Cashing out’ in sports betting: Implications for problem gambling and regulation. Gaming Law Review and Economics, in press.
Malatests & Associates Ltd (2014). 2014 British Columbia Problem Gambling Prevalence Study. Victoria, Canada: Gaming policy and enforcement branch, Ministry of Finance.
The Social Research Centre (2013) Gambling prevalence in South Australia. Adelaide, Australia: Office for problem gambling. Available from: http://phys.org/news/2012-03-lung-doctors-respiratory-diseases-worsen.html.
Wardle, H., Moody. A., Spence, S., Orford, J., Volberg, R., Jotangia, D., Griffiths, M.D., Hussey, D. & Dobbie, F. (2011). British Gambling Prevalence Survey 2010. London: The Stationery Office.
Wardle H, Seabury C, Ahmed H, et al. (2014) Gambling behaviour in England & Scotland. Findings from the health survey for England 2012 and Scottish health survey 2012. London: NatCen Social Research.
Wardle, H., Sproston, K., Orford, J., Erens, B., Griffiths, M.D., Constantine, R. & Pigott, S. (2007). The British Gambling Prevalence Survey 2007. London: The Stationery Office.
Tech’s appeal: Another look at Internet addiction
Generally speaking, Internet addiction (IA) has been characterized by excessive or poorly controlled preoccupation, urges, and/or behaviours regarding Internet use that lead to impairment or distress in several life domains. However, according to Dr. Kimberly Young, IA is a problematic behaviour akin to pathological gambling that can be operationally defined as an impulse-control disorder not involving the ingestion of psychoactive intoxicants.
Following the conceptual framework developed by Young and her colleagues to understand IA, five specific types of distinct online addictive behaviours were identified: (i) ‘cyber-sexual addiction’, (ii) ‘cyber-relationship addiction’, (iii) ‘net compulsions (i.e., obsessive online gambling, shopping, or trading), (iv) ‘information overload’, and (v) ‘computer addiction’ (i.e., obsessive computer game playing).
However, I have argued in many of my papers over the last 15 years that the Internet may simply be the means or ‘place’ where the most commonly reported addictive behaviours occur. In short, the Internet may be just a medium to fuel other addictions. Interestingly, new evidence pointing towards the need to make this distinction has been provided from the online gaming field where new studies (including some I have carried out with my Hungarian colleagues) have demonstrated that IA is not the same as other more specific addictive behaviours carried out online (i.e., gaming addiction), further magnifying the meaningfulness to differentiate between what may be called ‘generalized’ and ‘specific’ forms of online addictive behaviours, and also between IA and gaming addiction as these behaviours are conceptually different.
Additionally, the lack of formal diagnostic criteria to assess IA holds another methodological problem since researchers are systematically adopting modified criteria from other addictions to investigate IA. Although IA may share some commonalities with other substance-based addictions, it is unclear to what extent such criteria are useful and suitable to evaluate IA. Notwithstanding the existing difficulties in understanding and comparing IA with behaviours such as pathological gambling, recent research provided useful insights on this topic.
A recent study by Dr. Federico Tonioni (published in a 2014 issue of the journal Addictive Behaviors) involving two clinical (i.e., 31 IA patients and 11 pathological gamblers) and a control group (i.e., 38 healthy individuals) investigated whether IA patients presented different psychological symptoms, temperamental traits, coping strategies, and relational patterns in comparison to pathological gamblers, concluded that Internet-addicts presented higher mental and behavioural disengagement associated with significant more interpersonal impairment. Moreover, temperamental patterns, coping strategies, and social impairments appeared to be different across both disorders. Nonetheless, the similarities between IA and pathological gambling were essentially in terms of psychopathological symptoms such as depression, anxiety, and global functioning. Although, individuals with IA and pathological gambling appear to share similar psychological profiles, previous research has found little overlap between these two populations, therefore, both phenomena are separate disorders.
Despite the fact that initial conceptualizations of IA helped advance the current knowledge and understanding of IA in different aspects and contexts, it has become evident that the field has greatly evolved since then in several ways. As a result of these ongoing changes, behavioural addictions (more specifically Gambling Disorder and Internet Gaming Disorder) have now recently received official recognition in the latest (fifth) edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). Moreover, IA can also be characterized as a form of technological addiction, which I have operationally defined as a non-chemical (behavioural) addiction involving excessive human-machine interaction. In this theoretical framework, technological addictions such as IA represent a subset of behavioural addictions featuring six core components: (i) salience, (ii) mood modification, (iii) tolerance, (iv) withdrawal, (v) conflict, and (vi) relapse. The components model of addiction appears to be a more updated framework for understanding IA as a behavioural addiction not only conceptually but also empirically. Moreover, this theoretical framework has recently received empirical support from several studies, further evidencing its suitability and applicability to the understanding of IA.
For many in the IA field, problematic Internet use is considered to be a serious issue – albeit not yet officially recognised as a disorder – and has been described across the literature as being associated with a wide range of co-occurring psychiatric comorbidities alongside an array of dysfunctional behavioural patterns. For instance, IA has been recently associated with low life satisfaction, low academic performance, less motivation to study, poorer physical health, social anxiety, attention deficit/hyperactivity disorder and depression, poorer emotional wellbeing and substance use, higher impulsivity, cognitive distortion, deficient self-regulation, poorer family environment, higher mental distress, loneliness, among other negative psychological, biological, and neuronal aspects.
In a recent systematic literature review conducted by Dr. Wen Li and colleagues (and published in the journal Computers and Human Behavior), the authors reviewed a total of 42 empirical studies that assessed the family correlates of IA in adolescents and young adults. According to the authors, virtually all studies reported greater family dysfunction amongst IA families in comparison to non-IA families. More specifically, individuals with IA exhibited more often (i) greater global dissatisfaction with their families, (ii) less organized, cohesive, and adaptable families, (iii) greater inter-parental and parent-child conflict, and (iv) perceptions of their parents as more punitive, less supportive, warm, and involved. Furthermore, families were significantly more likely to have divorced parents or to be a single parent family.
Another recent systematic literature review conducted by Dr. Lawrence Lam published in the journal Current Psychiatry Reports examined the possible links between IA and sleep problems. After reviewing seven studies (that met strict inclusion criteria), it was concluded that on the whole, IA was associated with sleep problems that encompassed subjective insomnia, short sleep duration, and poor sleep quality. The findings also suggested that participants with insomnia were 1.5 times more likely to be addicted to the Internet in comparison to those without sleep problems. Despite the strong evidence found supporting the links between IA and sleep problems, the author noted that due to the cross-sectional nature of most studies reviewed, the generalizability of the findings was somewhat limited.
IA is a relatively recent phenomenon that clearly warrants further investigation, and empirical studies suggest it needs to be taken seriously by psychologists, psychiatrists, and neuroscientists. Although uncertainties still remain regarding its diagnostic and clinical characterization, it is likely that these extant difficulties will eventually be tackled and the field will evolve to a point where IA may merit full recognition as a behavioural addiction from official medical bodies (ie, American Psychiatric Association) similar to other more established behavioural addictions such as ‘Gambling Disorder’ and ‘Internet Gaming Disorder’. However, in order to achieve official status, researchers will have to adopt a more commonly agreed upon definition as to what IA is, and how it can be conceptualized and operationalized both qualitatively and quantitatively (as well as in clinically diagnostic terms).
Dr. Mark Griffiths, Professor of Gambling Studies, International Gaming Research Unit, Nottingham Trent University, Nottingham, UK
Please note: This article was co-written with Halley Pontes and Daria Kuss.
Further reading
Griffiths, M.D. (2000). Internet addiction – Time to be taken seriously? Addiction Research, 8, 413-418.
Griffiths, M.D. (2010). Internet abuse and internet addiction in the workplace. Journal of Workplace Learning, 7, 463-472.
Griffiths, M.D., Kuss, D.J., Billieux J. & Pontes, H.M. (2016). The evolution of internet addiction: A global perspective. Addictive Behaviors, 53, 193–195.
Griffiths, M.D. & Pontes, H.M. (2014). Internet addiction disorder and internet gaming disorder are not the same. Journal of Addiction Research and Therapy, 5: e124. doi:10.4172/2155-6105.1000e124.
Király, O., Griffiths, M.D., Urbán, R., Farkas, J., Kökönyei, G. Elekes, Z., Domokos Tamás, D. & Demetrovics, Z. (2014). Problematic internet use and problematic online gaming are not the same: Findings from a large nationally representative adolescent sample. Cyberpsychology, Behavior and Social Networking, 17, 749-754.
Kuss, D.J. & Griffiths, M.D. (2015). Internet Addiction in Psychotherapy. Basingstoke: Palgrave Macmillan.
Kuss, D.J., Griffiths, M.D. & Binder, J. (2013). Internet addiction in students: Prevalence and risk factors. Computers in Human Behavior, 29, 959-966.
Kuss, D.J., Griffiths, M.D., Karila, L. & Billieux, J. (2014). Internet addiction: A systematic review of epidemiological research for the last decade. Current Pharmaceutical Design, 20, 4026-4052.
Kuss, D.J., Shorter, G.W., van Rooij, A.J., Griffiths, M.D., & Schoenmakers, T.M. (2014). Assessing Internet addiction using the parsimonious Internet addiction components model – A preliminary study. International Journal of Mental Health and Addiction, 12, 351-366.
Kuss, D.J., van Rooij, A.J., Shorter, G.W., Griffiths, M.D. & van de Mheen, D. (2013). Internet addiction in adolescents: Prevalence and risk factors. Computers in Human Behavior, 29, 1987-1996.
Lam, L.T. (2014). Internet Gaming Addiction, Problematic use of the Internet, and sleep problems: A systematic review. Current Psychiatry Reports, 16(4), 1-9.
Li, W., Garland, E.L., & Howard, M.O. (2014). Family factors in Internet addiction among Chinese youth: A review of English-and Chinese-language studies. Computers in Human. Behavior, 31, 393-411.
Pontes, H. & Griffiths, M.D. (2015). Measuring DSM-5 Internet Gaming Disorder: Development and validation of a short psychometric scale. Computers in Human Behavior, 45, 137-143.
Pontes, H.M., Kuss, D.J. & Griffiths, M.D. (2015). The clinical psychology of Internet addiction: A review of its conceptualization, prevalence, neuronal processes, and implications for treatment. Neuroscience and Neuroeconomics, 4, 11-23.
Pontes, H.M., Szabo, A. & Griffiths, M.D. (2015). The impact of Internet-based specific activities on the perceptions of Internet Addiction, Quality of Life, and excessive usage: A cross-sectional study. Addictive Behaviors Reports, 1, 19-25.
Tonioni, F., Mazza, M., Autullo, G., Cappelluti, R., Catalano, V., Marano, G., … & Lai, C. (2014). Is Internet addiction a psychopathological condition distinct from pathological gambling?. Addictive Behaviors, 39(6), 1052-1056.
Widyanto, L. & Griffiths, M.D. (2006). Internet addiction: A critical review. International Journal of Mental Health and Addiction, 4, 31-51.
Young, K. (1998). Caught in the net. New York: John Wiley
Young K. (1999). Internet addiction: Evaluation and treatment. Student British Medical Journal, 7, 351-352.