Information and communication technologies provide a new context for interpersonal relationships, learning and professional activities. Nevertheless, there are several risks related to technology use, including compulsive Internet use. Even though compulsive Internet use has been identified as an important problem behavior in young people, there are still gaps in knowledge regarding its measurement in Spanish-speaking countries. Thus, the objective of this study was to validate the Compulsive Internet Use Scale (CIUS) in Spain, Colombia, and Mexico using a sample of 2,090 15-30 year olds. Results showed that the questionnaire has excellent psychometric properties and confirmed its original unidimensional factor structure. Inter-item polychoric correlations showed optimum values that indicated consistency and high quality of the construct. A confirmatory factor analysis showed an excellent model fit for all the subsamples, including Spain, Colombia, and Mexico. A multigroup analysis showed measurement invariance across the studied countries. Given that the CIUS is one of the most popular instruments used to measure excessive Internet use around the world, it can now be used in crossnational comparative studies, including Spain, Colombia, and Mexico, together with other countries. It can also be used to evaluate intervention programs in the studied countries.
Keywords: Spanish-speaking countries; compulsive Internet use; instrumental study; psychometric properties.