RT Journal Article T1 An Integrative Model of Online Activity Frequency, Problematic Internet Use, Nomophobia and Phubbing Among University Students A1 Muñoz Carril, Pablo César A1 Mosquera Bargiela, Inés A1 Estévez Blanco, Iris A1 Platas Ferreiro, María Lidia K1 Phubbing K1 Nomophobia K1 Problematic Internet use K1 Online activity frequency K1 Smartphone K1 University K1 Students K1 Structural model K1 PLS-SEM AB Digital behaviour in higher education must be approached not only as a psychological phenomenon but also as a pedagogical issue with direct implications for academic wellbeing and learning processes. The present study evaluates an integrated model that links frequency of online activity, problematic Internet use, nomophobia, and phubbing among university students. A quantitative-transversal methodology was applied. A structural equation model was specified using partial least squares (PLS-SEM) in order to analyse the combined direct and indirect effects between the constructs studied. The sample comprised 1922 Spanish university students. The instrument was made up of four scales designed to assess the frequency and type of Internet use, problematic Internet use, nomophobia, and phubbing. The results support the four hypotheses established via the model to explain the relationships between the variables. The explanatory power of the model around the construct of phubbing stood out, and nomophobia was determined to have a partial mediating role between problematic Internet use and phubbing. Guidance is discussed for the design of interventions to address the issues these phenomena cause. PB Multidisciplinary Digital Publishing Institute YR 2026 FD 2026-03-06 LK https://hdl.handle.net/10347/46286 UL https://hdl.handle.net/10347/46286 LA eng NO Muñoz-Carril, P.-C., Bargiela, I. M., Estévez, I., & Platas-Ferreiro, M.-L. (2026). An Integrative Model of Online Activity Frequency, Problematic Internet Use, Nomophobia and Phubbing Among University Students. Education Sciences, 16(3), 404. https://doi.org/10.3390/educsci16030404 NO This research was funded by the Lugo City Council under the project “II Estudio Epidemiológico sobre Adicciones sin Sustancia (Uso y Abuso de las TIC) y Consumos de Sustancias Psicoactivas en la Población Universitaria del Campus de Lugo”, carried out within the municipal “+porTI” programme and supported by a grant awarded by the Spanish Government Delegation for the National Plan on Drugs (Ref. 2025-CP022). DS Minerva RD 23 may 2026