Vicious circle of family dysfunction and adolescent internet addiction: Do only child and non-only child exhibit differences?

The primary aim of the current study was to probe the longitudinal relationships between family dysfunction (FD) and adolescent Internet addiction (IA), as well as the group difference between only child and non-only child. Data were from a three-wave longitudinal data of 1301 Chinese adolescents, collected when adolescents were at Grade 7, Grade 8, and Grade 9. FD and IA were assessed via adolescent self-reported questionaries of Chinese Family Assessment Instrument and Internet Addiction Test. Cross-lagged panel model was constructed to estimate possible associations between FD and adolescent IA after controlling for demographic variables. Our results suggest that adolescents might get stuck in a vicious cycle of dysfunctional family and addictive Internet use: adolescents who lived in a dysfunctional family showed increased risk in IA in the subsequent year; in turn, adolescent IA further increased the possibility of FD. Moreover, multigroup comparison analysis revealed that the vicious cycle between FD and adolescent IA could be applied to both the only child and the non-only child. The findings may enrich the application of the Developmental Contextualism Theory and contribute to the identification of the starting points for intervention strategies of adolescent IA.