Psychometric Properties of the Nine-Item Problematic Internet Use Questionnaire in a Brazilian General Population Sample

Objective: The goal of the study is to adapt and examine psychometric properties Brazilian version nine-item Problematic Internet Use Questionnaire (PIUQ-SF-9). Methods: A convenience sample internet users aged between 18 89 years (72.7% female, mean age 38.7 ± 13.5) was recruited online from September 2018 July 2019 (test = 1,525; retest 237). Participants responded adapted PIUQ-SF-9, as well Center for Epidemiologic Studies-Depression Scale (CES-D-10) sociodemographic questions. Results: bifactor model with one general factor three specific dimensions (obsession, neglect control disorder) yielded best fit indices [? 2 67.66, df 15, CFI 0.99, TLI RMSEA 0.048 (0.037–0.060), p close 0.587 SRMR 0.01]. McDonald's hierarchical omega coefficient 0.76 varied 0.16 0.33 dimensions. intraclass correlation 0.73 0.64 0.72 MIMIC supported scale's construct validity relationship predictors (age, time spent online, self-perception problematic use, depression symptoms) PIUQ-SF-9 factors in line assumptions based on literature. Conclusion: seems be a brief culturally validated instrument sound used future studies use population.