“…To account for the potential confounding effects, three individual factors (i.e., age, trait anger, and cyber-victimization) and one family environmental factor (i.e., families’ economic stress) were considered as control variables when the hypotheses were examined. Prior studies indicate that cyberbullying perpetration is positively associated with these variables (Antoniadou & Kokkinos, 2018; Jiang et al, 2019; Kowalski et al, 2014; Lapa et al, 2013; Schieman & Van Gundy, 2000; Walrave & Heirman, 2011; Wang et al, 2017, 2019b; Wright & Wachs, 2020; Yang et al, 2020; Zych et al, 2019). For instance, the results show that cyberbullying perpetration is often significantly associated with cyber victimization (Zych et al, 2019), and trait anger is significantly and positively associated with cyberbullying perpetration (Wang et al, 2017; Yang et al, 2020).…”