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Psicothema was founded in Asturias (northern Spain) in 1989, and is published jointly by the Psychology Faculty of the University of Oviedo and the Psychological Association of the Principality of Asturias (Colegio Oficial de Psicólogos del Principado de Asturias).
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A Reliability Generalization Meta-analysis of the South Oaks Gambling Screen (SOGS)

Javier Esparza-Reig1, Alejandro Guillén-Riquelme2, Manuel Martí-Vilar1, and Francisco González-Sala1

1 Universitat de València, and
2 Universidad de Granada

Background: The South Oaks Gambling Screen (SOGS) is one of the most widely used screening instruments for evaluating addiction to gambling. Method: The main objective of this study is to analyze whether the SOGS is a reliable instrument and what characteristics of studies on the SOGS are linked to its reported reliability. Results: A meta-analysis was carried out with 63 studies including 65 independent samples. The mean value of a was .86 (95% CI of .84–.88), with high heterogeneity (I2 = 98.27%). The variables that explain the most heterogeneity were the continent where the study was performed (R2 = .61), application to participants with or without clinical problems (R2 = .58), the form of administration of the questionnaire (R2 = .56), and the standard deviation in the SOGS score (R2 = .13). Conclusions: The results show that the SOGS is a reliable instrument for evaluating gambling addiction. However, the meta-analysis highlights the need to report the reliability values for each empirical study and to provide a set of recommendations for researchers and professionals who use this instrument.

Meta-análisis de Generalización de la Fiabilidad del South Oaks Gambling Screen (SOGS). Antecedentes: el South Oaks Gambling Screen (SOGS) es uno de los instrumentos de screening más utilizados para los problemas de adicción al juego. Método: el objetivo de esta investigación es analizar si el SOGS es un instrumento fiable y qué características de los estudios tienen efectos en su fiabilidad. Resultados: se llevó a cabo un meta-análisis con 63 estudios incluyendo 65 muestras independientes. El valor medio de a fue .86 (95% CI .84–.88), con una elevada heterogeneidad (I2 = 98.27%). Las variables que explicaron más heterogeneidad fueron el continente en que se desarrolló el estudio (R2 = .61), la aplicación en participantes con o sin problemas clínicos (R2 = .58), la forma de administración del cuestionario (R2 = .56) y la desviación estándar en la puntuación del SOGS (R2 = .13). Conclusiones: los resultados muestran que el SOGS es un instrumento fiable para evaluar los problemas de adicción al juego. Por otro lado, el meta-análisis recalca la necesidad de reportar los valores de fiabilidad en cada investigación empírica que se realice, y proporciona una serie de recomendaciones para investigadores y profesionales que utilicen este instrumento.

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