Bullo, Anna Schulz, Peter J. 2022 To understand the development of cyber aggression during adolescence, it is important to consider the temporal variability of its potential predictors. This study uses a four-wave survey to investigate how changes in peer norms, parental norms, and parental communication are associated with two-year trajectories of online peer aggression. The sample includes 1521 Swiss middle school students (Mage T1 = 11.54, SD = 0.40; 48% female). The results showed that over time a better parental communication quality and anti-aggression norms predicted lower rates and slower development of cyber aggression. Moreover, parental variables emerged as a quite stable deterrent of aggressive conduct. Although entrance into adolescence is characterized by the rise of peer influence, results from this study suggest that parents maintain an important protective role. application/pdf https://susi.usi.ch/global/documents/324939 https://n2t.net/ark:/12658/srd1324939 https://susi.usi.ch/documents/324939/files/Schulz_2022_Spri_jya (1).pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s10964-022-01625-1 info:eu-repo/semantics/altIdentifier/ark/12658/srd1324939 info:eu-repo/semantics/openAccess CC BY Journal of youth and adolescence. - 2022, vol. 51, p. 1774–1786 Early adolescence Parent-child communication Cyber aggression Social norms Longitudinal info:eu-repo/classification/udc/3 Parent-child communication, social norms, and the development of cyber aggression in early adolescence http://purl.org/coar/resource_type/c_6501