Psychometric Validation of the Gambling Passion Scale (GPS) in an English-speaking University Sample

The Gambling Passion Scale (GPS) is a recently developed research instrument for assessing individuals' passion for gambling. Because the psychometric properties of the GPS have only previously been examined in French Canadians, the aim of this study was to replicate previous psychometric findings in an English-speaking university sample. Participants (female: n = 58; male: n = 89) were drawn from a university campus based on self-reported experience with gambling indexed by scores on the South Oaks Gambling Screen (SOGS). The two-factor structure reported by Rousseau et al. (Journal of Gambling Studies, 18(1), pp. 45–66, 2002) was largely replicated in this sample, as were relationships between ‘obsessive passion’ and negative consequences stemming from gambling. These results support the validity of the GPS as a measure of gambling passion in English-speaking university gamblers and its potential to contribute to understanding problem gambling.     

Narrowing of Attention and Dissociation in Pathological Video Lottery Gamblers

The phenomena of attention and dissociation were investigated in pathological and occasional video lottery (VLT) gamblers. Twelve problem VLT gamblers [mean age 41.3; 6 male, 6 female; South Oaks Gambling Screen (SOGS; Lesieur & Blume, 1987) scores 5] were compared to a group of 11 occasional VLT gamblers, (mean age 31.9; 4 male, 7 female; SOGS scores < 5). Pathological gamblers were slower than occasional gamblers in reacting to irrelevant external light stimuli while playing on a demonstration video lottery terminal. They were significantly more likely to report more symptoms of general dissociation as measured by the Dissociative Experiences Scale (Bernstein & Putnam, 1986). The results suggest that pathological gamblers may experience a greater narrowing of attention than occasional gamblers when engaged in VLT play.     

Alexithymia and Gambling: A Risk Factor for All Gamblers?

The purpose of this study was to investigate alexithymia (in relation with depression) in three groups of French gamblers (n = 186) recruited in their gambling location: at the racetracks (n = 80 males; mean age 28.1 years), in the slot machine rooms (n = 65; 29 males, 36 females; mean age 34.6 years), and in the traditional gaming rooms (n = 41 males; mean age 36 years). Gambling behavior was measured by the South Oaks Gambling Screen and DSM-IV criteria for pathological gambling, Alexithymia by the Toronto Alexithymia Scale (TAS-20) and depression with the Beck Depression Inventory (BDI-13). For racetracks and slot machine gambling, pathological gamblers differed from non-pathological gamblers, regarding their alexithymia scores. These results remained stable after controlling for depression scores among the racetracks gamblers only. The relationship between alexithymia and depression depends on the type of pathological gambler. These findings are consistent with the idea of identifying clinically distinct subgroups of gamblers.     

DSM-IV and the South Oaks Gambling Screen: diagnosing and assessing pathological gambling in Turkey

The main purpose of this study was to investigate the effectiveness of the DSM-IV diagnostic criteria and the South Oaks Gambling Screen (SOGS) in identifying Turkish pathological gamblers. Fifty-nine subjects participated in the study. The subjects were diagnosed as either pathological gamblers or not (comparison group) through the use of the DSM-IV criteria and were given the Turkish version of the SOGS. Four of the ten DSM-IV criteria were found to be problematic in the diagnosis of Turkish pathological gamblers. The data concerning reliability and validity of the Turkish version of the SOGS suggested that the SOGS can be used as a reliable and valid instrument in identifying Turkish pathological gamblers. Most (16 out of 20) of the items of the SOGS appear to work well in discriminating pathological gamblers from the subjects in the comparison group. In the case of the two DSM-IV criteria and the four SOGS items that failed to discriminate, cultural factors seemed to be responsible for the failure.     

Reliability,Validity, and Cut Scores of the South Oaks Gambling Screen (SOGS) for Chinese

We examined the reliability, validity, and classification accuracy of the South Oaks Gambling Screen (SOGS) when adopted for use in Chinese. The DSM-IV criteria for pathological gambling served as the standard against which the classification accuracy of the SOGS was tested. A total of 283 Chinese adults in the community and 94 Chinese treatment-seeking gamblers were recruited. The internal reliability of the SOGS was satisfactory for the general sample and acceptable for the gambling sample. The SOGS was correlated with the DSM-IV criteria items as well as psychosocial and gambling-related problems. Relative to the DSM-IV criteria, the SOGS tended to overestimate the number of pathological gamblers in both samples. In general, we were relatively confident that individuals were not pathological gamblers if the SOGS scores were between 0 and 4 and were pathological gamblers if the SOGS were between 11 and 20. There was about 50–50 chance of being pathological gamblers if the SOGS scores were between 8 and 10. However, the probability of individuals being pathological gamblers was about 0.30 if the SOGS scores were between 5 and 7. We proposed a SOGS cut score of 8 to screen for probable pathological gambling in Chinese societies.     

Explaining the High False Positive Rate of the South Oaks Gambling Screen

The South Oaks Gambling Screen (SOGS) has been used extensively in estimating the prevalence of pathological gambling but produces a large number of false positive classifications. Ladouceur et al. (, Journal of Gambling Studies, 16, pp. 1–24) claim that misunderstanding of SOGS items is responsible for the high false positive rate. However, their study is open to a number of methodological criticisms. The current study, where clinical and non-clinical gamblers complete the SOGS with and without clarification, overcomes these problems. Results suggest that clarification does not have a significant overall effect on SOGS scores. This implies that item misunderstanding is not responsible for the false positive rate of the SOGS.     

Rates of pathological gambling in publicly funded outpatient substance abuse treatment

Rates of problem or probable pathological gambling were assessed in substance abusers seeking outpatient treatment in a publicly funded outpatient substance abuse treatment program. The South Oaks Gambling Screen (SOGS) was administered to 467 consecutive admissions at three different sites. Problem gamblers comprised 6.2 percent of the total (n=29), and 4.5 percent scored as probable pathological gamblers (n=21). These rates are two and one-half times greater than would be expected according to a recent state survey using the SOGS. Implications for assessment and treatment of problem gambling are discussed.The author expresses his appreciation to John Ramsay and the staff of Epoch Counseling Center for data collection; to Les Franklin for computational analysis; and Dr. Rachel Volberg for providing supplemental data from her Maryland State Gambling Survey.     

The classification accuracy of four problem gambling assessment instruments in population research

Improved methodology was used to re-examine the weak correspondence between problem and pathological gamblers identified in population surveys and subsequent classification of these individuals in clinical interviews. The SOGS-R, the CPGI, the NODS and the Problem and Pathological Gambling Measure (PPGM), as well as questions about gambling participation and expenditures, were administered to a total of 7272 adults. Two clinicians then assessed each person's status, based on comprehensive written profiles derived from these questionnaire responses. Instrument classification was then compared to clinical classification. All four instruments correctly classified most non-problem gamblers (i.e. had good to excellent sensitivity, specificity and negative predictive power). However, the PPGM was the only instrument with good classification of problem gamblers (i.e. excellent sensitivity and positive predictive power). The CPGI and SOGS-R had weak positive predictive power and the NODS had only adequate sensitivity and positive predictive power. Improvement in the classification accuracy of the CPGI occurred when a 5+ cut-off was used and when a 4+ cut-off was used with the SOGS. In general, the classification accuracy of the NODS, SOGS and CPGI is better than prior research suggested but overall accuracy is still modest. With adjusted cut-offs, all three instruments are reasonably congruent with clinical ratings.     

Is the SOGS an Accurate Measure of Pathological Gambling Among Children, Adolescents and Adults?

The South Oaks Gambling Screen (SOGS) is widely used to assess the prevalence of pathological gambling. For a variety of reasons, this instrument may not provide an accurate rate of the prevalence of pathological gambling. In this paper, one source of error in data provided by the SOGS is investigated. It is argued that individuals may not fully understand the meaning of some items, and that clarification of the meaning of misunderstood items may in some cases lead to a changed score on the scale. The present study evaluates respondents' understanding of the SOGS items. The results from three studies are reported, each using a different sample: grade school children, adolescents and adults. It was hypothesised that (1) participants would not understand some items of the SOGS, (2) problem gamblers and probable pathological gamblers would be more inclined to interpret items incorrectly than would non-problem gamblers and, (3) consistent with the first two hypotheses, clarification of items would decrease the number of participants identified as problem gamblers or probable pathological gamblers. The data obtained supported hypotheses 1 and 3. Furthermore, hypothesis 2 was supported for grade school children, but not for adolescents or adults. These results are consistent with recent literature on endorsement and acquiescence phenomena, and have implications for prevalence studies of probable pathological gambling.     

Brief Communications Analysis of a Casino's Self-Exclusion Program

As gambling facilities become more available, the number of pathological gamblers increases. Effective therapeutic and preventive interventions should be developed and systematically evaluated. Self-exclusion programs may be a useful means to facilitate self-control among problem gamblers. This paper describes the characteristics of individuals who decided to bar themselves from a Canadian casino. Two hundred twenty individuals participated in the present study and completed a questionnaire including four sections: (1) socio-demographic data, (2) the South Oaks Gambling Screen, (3) gambling habits, and (4) prior experiences with the self-exclusion program. According to the SOGS, 95% of the participants were classified as severe pathological gamblers on the SOGS (Mean score = 9.87). Furthermore, based on self-reported observation, 30% of the participants completely stopped gambling once enrolled in this program. No one scored within the interval of non-problem gamblers. Suggestions to improve self-exclusion programs are discussed.     

Gambling Screens: Does Shortening the Time Frame Affect their Psychometric Properties?

Gambling screening tools such as the South Oaks Gambling Screen (SOGS) and a DSM-IV Screen for Gambling Problems (NODS) developed by the National Opinion Research Council have psychometrically validated lifetime and past-year versions. As research questions often dictate shorter time intervals, researchers have adapted the time frames of these instruments to their specific purposes without examining whether changing the time frame affects the psychometric properties. In this study, 3-month versions of SOGS and NODS were administered to a sample of 80 pathological gamblers (59 men, 21 women, mean age 44) seeking treatment at a state-funded facility. The 3-months versions had good internal consistency, good convergent validity with each other, with gambling behaviors assessed via the timeline followback method, and with measures of impulsivity. The 3-month versions also showed good discriminant validity with demographic variables and a measure of verbal IQ. Together the data indicate that shortening the time frame to 3 months does not seem to have adverse effects on the psychometric properties of SOGS and NODS. Thus these adapted versions could profitably be used for shorter time intervals, including as pre/post-treatment and follow-up measures in treatment outcome studies.     

Reliability and Validity of the Pathological Gambling Adaptation of the Yale-Brown Obsessive-Compulsive Scale (PG-YBOCS)

The Yale Brown Obsessive Compulsive Scale adapted for Pathological Gambling (PG-YBOCS) was developed to measure the severity and change in severity of pathological gambling symptoms. The PG-YBOCS is a 10-item clinician-administered questionnaire that measures the severity of PG over a recent time interval (usually within the past one/two week(s)). In order to assess and validate the scale, it was administered to 337 subjects: 188 pathological gamblers and 149 healthy controls. Internal consistency and correlations between individual items and total score were assessed for various permutations of the sample. Other scales were administered to assess convergent, discriminant and content validity. Sensitivity to change was evaluated in treatment studies with fluovoxamine, lithium, and valproate. Each item was frequently endorsed across a range of severity. Good inter-rater reliability and internal consistency were obtained. The PG-YBOCS showed high validity and reliability for total score, item-total correlations, and for each subscale (Thoughts/Urges and Behavior). PG-YBOCS scores correlated with global severity and South Oaks Gambling Screen (SOGS) scores. The scale was also sensitive to change in pathological gambling severity. PG-YBOCS thus appears to be a reliable and valid measure of pathological gambling severity, and can be regarded as an important tool for clinicians and researchers treating pathological gamblers.     

Potential and probable pathological gamblers: Where do the differences lie?

A large proportion of adolescents engage in gambling activities and the prevalence of pathological gambling is high. This study presents a factor analysis of responses from 122 college students who obtained a score of 3 or greater on the South Oaks Gambling Screen (SOGS), the most widely used instrument to identify probable and potential pathological gamblers. The analysis showed five dimensions: Illegal Behaviors, Heavy Gambling, Eating Disorders, Parentally Modelled/Less Impulsive, and Worry. Analyses revealed that except for the Eating Disorders factor, all factors clearly differentiated the probable from potential pathological gamblers, as identified by the SOGS. Results raise important questions about the relationship of pathological gambling to other psychopathological or antisocial behaviors. Thus the probable pathological gambler category represents a wide-ranging behavioral profile that goes beyond gambling per se. Avenues for future research as well as clinical implications are discussed.This research was partially supported by grants from Le Fonds Richelieu, le Conseil Québécois de la Recherche Sociale and the Social Sciences and Humanities Research Council of Canada.     

Comorbid mood and adjustment disorders among pathological gamblers seeking treatment in Hong Kong

Research findings on comorbidity and pathological gambling are non–existent in Chinese communities. The objectives of this study were to: (a) determine the prevalence of comorbid mood and adjustment disorders among pathological gamblers seeking treatment in Hong Kong; (b) compare demographic profiles and clinical features in pathological gamblers with and without comorbid mood and adjustment disorders; and (c) explore the association and temporal relationship between pathological gambling and comorbid mood and adjustment disorders. Assessment instruments included demographic data, BSI, SCID-I, ASI and LIFE-RIFT. Results showed that about two-thirds (63.7%; n = 128) of 201 participants reported lifetime comorbid psychiatric disorders. Most common comorbid disorders were mood disorders (29.4%; n = 59) and adjustment disorders (20.9%; n = 42). Pathological gamblers with comorbid mood or adjustment disorders showed more severe levels of psychopathology, impairment in psychosocial functioning and gambling problems. This study is important because it is the first scientific comorbidity study among pathological gamblers in a Chinese context.     

The Experience of Gambling and its Role in Problem Gambling

This paper reports on the results of a psychological study conducted in Ontario, Canada, that attempted to answer the question of why some people develop gambling problems while others do not. A group of social gamblers (n = 38), sub-clinical problem gamblers (n = 33) and pathological gamblers (n = 34) completed a battery of questionnaires. Compared to non-problem gamblers, pathological gamblers were more likely to report experiencing big wins early in their gambling career, stressful life events, impulsivity, depression, using escape to cope with stress and a poorer understanding of random events. We grouped these variables into three risk factors: cognitive/experiential, emotional and impulsive and tested the extent to which each risk factor could differentiate non-problem and pathological gamblers. Each risk factor correctly identified about three-quarters of the pathological gamblers. More than half (53%) of the pathological gamblers had elevated scores on all three risk factors. Interestingly, 60% of the sub-clinical cases had elevated scores on only one risk factor. The results are interpreted in terms of a bio-psycho-social model of gambling addiction.     

SOGS and CGPI: Parallel Comparison on a Diverse Population

The Northern Territory of Australia, one of the most demographically and socially diverse jurisdictions in the country, conducted its first population-based gambling and problem gambling prevalence survey in 2005. Both the South Oaks Gambling Screen (SOGS) and the Canadian Problem Gambling Index (CPGI) were administered to the same sample of respondents. Using data from this survey, the current paper presents a parallel comparison of the respective screens with particular reference to gender, region, and the socio-demographic characteristics of respondents. The respective screens produced significantly different groups of problem gamblers as measured by their association with a range of socio-demographic variables. Specifically, the large number of SOGS items related to money issues may cause selective overrepresentation among low socioeconomic groups, including Indigenous people, who exist in relatively high proportions in the Northern Territory. In addition, there existed substantial gender-based differences within screens. Identified female problem gamblers were associated with household level variables (i.e. employment status, household type and marital status), while males were associated with socio-economic variables including language, education, and income. Further research is required to validate the use of problem gambling screens within the Indigenous population and to understand the role of gender in the experience and categorisation of problem gambling.     

Clinical obstacles in administrating the South Oaks Gambling Screen in a methadone and alcohol clinic

The South Oaks Gambling Screen (SOGS) was administered to veterans in both an outpatient methadone and problem drinking clinic. The instrument was given to 93 veterans who represented the poor and homeless. It was anticipated that the SOGS would provide important diagnostic information to the clinicians counseling the substance abusing population since many compulsive gamblers have a history of substance abuse. A number of clinical obstacles were encountered in administrating the SOGS in this environment. Both Client and staff noncompliance during the screening were major concerns in this respect. The clinical obstacles encountered in this study were examined and suggestions to prevent these problems are discussed.I would like to thank Howard Shaffer, Ph.D. and the referees for the advice on earlier drafts of this paper.     

Alcohol’s Effects on Video Lottery Terminal (VLT) Play Among Probable Pathological and Non-Pathological Gamblers

This study tested whether alcohol increases behaviors associated with video lottery terminal (VLT) play, particularly among probable pathological gamblers. Forty-four regular VLT players were designated either probable pathological gamblers or non-pathological gamblers on the basis of scores on the South Oaks Gambling Screen (SOGS); [Lesieur & Blume (1997). American Journal of Psychiatry, 144, 1184–1188] Gamblers from each SOGS category were randomly assigned to either a moderately intoxicating alcohol dose or a control beverage condition (n = 11 per cell in the 2 × 2 between-subjects design). Following beverage consumption and absorption, participants played a video poker VLT game for up to 30 minutes. Four behaviors were measured: “power-bets” (doubling bet after viewing only two cards of the five-card poker hand); total money spent; mean bet magnitude; and number of minutes played. Alcohol increased time spent playing and rate of power-bets, particular among the probable pathological gamblers. Post hoc analyses revealed that alcohol also influenced the proportion of losing hands played––increasing them among the probable pathological gamblers while decreasing them among the non-pathological gamblers. Clinical and policy implications of the findings are discussed.     

Gambling motivation: comparisons across gender and preferred activity

People gamble for emotional, social and monetary reasons. However, it remains unclear whether the relationships between these distinct aspects of gambling motivation and gambling behaviour hold across gender and types of gambling. Thus, the current study compared gambling motivation across different subgroups while taking into account problem gambling severity. A total of 4945 adults were recruited as part of the Northern Territory (Australia) population gambling survey. Of the full sample, 1207 participants (52% female) completed the Gambling Outcomes Expectancies Scale to assess gambling motivation. This subsample comprised those who scored one or more on the PGSI (n = 407) and a random sample of those who gambled at least once a year with a PGSI of zero (n = 800). The findings revealed excitement, escape and monetary expectancies increased in concert with gambling risk for both men and women, although only escape differentiated the low-risk and at-risk gamblers when other expectancies were controlled. In relation to differences across types of gambling, horse races/sports bettors rated excitement but not escape more favourably than lottery players. These findings suggest problem gambling severity should be considered when examining motivation difference by gender and that gambling motivation depends, in part, on preferred activity.