The use of the Internet has been gradually and unstoppably gaining ground in all areas of life, from recreational activities to how social relations are established. However, the existence of clinical cases indicates that the addictive use of the Internet is a problem that seriously affects some people. Among the instruments that measure this construct, the Internet Addiction Test (IAT) stands out. However, instrumental studies of this test are scarce in Latin America. The present study sought to analyze the psychometric properties of the IAT in a sample of 227 Peruvian undergraduate university students. Confirmatory factor analysis was used to provide validity evidence based on the internal structure, and evidence based on the relationship with other variables was also provided. Reliability was estimated through the ordinal alpha coefficient. The results indicated that the IAT adequately fits a bifactor model (with two specific factors, time/control and stress/compensate), obtaining good levels of reliability. Additionally, the IAT scores correlate significantly with the average number of hours per day on the internet and social skills. The results lead to the conclusion that the scores in the IAT have evidence of validity and reliability for its use.

In recent years, the study of heavy work investment (HWI) has been diversifying greatly in the various fields of application in the organizational field, for example, occupational health, human resources, quality at work among others. However, to date, no systematic review has been carried out to examine the methodological quality of the instruments designed to measure HWI. Therefore, the present systematic review examines the psychometric properties of three main measures of HWI: Workaholism Battery (WorkBAT), Work Addiction Risk Test (WART), and Dutch Work Addiction Scale (DUWAS). Five electronic databases were systematically searched, selecting psychometric articles. Of the 2621 articles identified, 35 articles met all inclusion criteria published between 1992 and 2019. The findings indicated that most of the articles were focused on reviewing psychometric properties, analyses were conducted from classical test theory, collected validity evidence based on internal structure and relationship with other variables, and reliability of scores was obtained through the internal consistency method. Of the instruments reviewed, the DUWAS is the one with the highest methodological quality. Recommendations are made for future research to address the psychometric study of these instruments based on recent advances in the field of organizational measurement.

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El presente estudio tiene como objetivo analizar la probabilidad de ser informal en las ciudades capitales del eje cafetero a partir del planteamiento institucionalista de la informalidad según el Departamento Administrativo Nacional de Estadística. Con la información de la Gran encuesta integrada de hogares del año 2019 se estiman tres modelos de probabilidad: lineal, Probit y Logit. Los resultados de las estimaciones permiten concluir que existe una probabilidad mayor de ser informal para quienes viven en la ciudad de Armenia y una menor para quienes se encuentra en la ciudad de Manizales; en otras palabras, las ciudades pequeñas generan mayores grados de informalidad, en comparación con las ciudades que tienen actividades productivas diversificadas, como es el caso de Pereira. Además, en los modelos estimados se encontró que la variable escolaridad no resulta significativa, la variable edad tiene una relación inversa con la informalidad; mientras que, el género y el parentesco con el propietario del negocio tienen una relación directa con la probabilidad de tener un empleo informal.

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