Bystanders play a key role in understanding the phenomenon of cyberbullying (CB). The main aim of this study is to explore longitudinal bidirectional relationships among cyberbystanders' reaction, CB perpetration, and CB justification. Participants were 1,105 adolescents (56.7% girls; M[subscript age] = 13.56, SD = 1.21) who answered self-reported…

There is currently no evidence of the relationship between cyber dating abuse (CDA) and health-related quality of life (HRQoL), especially from a longitudinal perspective. The objectives were: (a) to analyze the point and period prevalence, incidence, and score changes over time of victimization by CDA; (b) to compare HRQoL in the different…