20 questions of Gamblers Anonymous : A psychometric study with population of Spain

The authors present a psychometric study of the questionnaire proposed by the Gamblers Anonymous organization for the self-assessment of problem gambling. The study was carried out in Spain with two samples: one of 127 problem gamblers (mean age: 41.67; sex: 78.7% men; mean duration of the problem:...

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Bibliographic Details
Published in:Journal of gambling studies 1998, Vol.14 (1), p.3-17
Main Authors: PRIETO URSUA, M, URIBELARREA, L. L
Format: Article
Language:English
Subjects:
Biological and medical sciences
Medical sciences
Pathological gambling
Psychology. Psychoanalysis. Psychiatry
Psychometrics. Diagnostic aid systems
Psychopathology. Psychiatry
Quantitative psychology
Questionnaires
Selfassessment
Spain
Techniques and methods
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Summary:The authors present a psychometric study of the questionnaire proposed by the Gamblers Anonymous organization for the self-assessment of problem gambling. The study was carried out in Spain with two samples: one of 127 problem gamblers (mean age: 41.67; sex: 78.7% men; mean duration of the problem: 5 years) and the other of 142 social gamblers (mean age: 38.46; sex: 60% men). The questionnaire was self-applied, in the presence of one of the investigators in case any doubts arose. The results indicate that it is a good screening instrument, with high reliability (Cronbach's alpha = 0.94), good covergent validity (the correlation with the SOGS questionnaire is high (r = 0.94; p < 0.001)), good factorial validity (the questionnaire's structure is unidimensional and coherent (just one factor explains more than 50% of the variance)), and its discriminative power is high (diagnostic efficacy = 98.88%). The study offers a comparative analysis of this instrument with other measures of problem gambling, emphasizing its extraordinary performance.
ISSN:1050-5350
1573-3602
DOI:10.1023/a:1023033924960