Abstract: The phenomenon of cyberbullying triggered by the group polarisation effect is endless and seriously disrupts social order, but the transformative relationship and internal structure between the group polarisation effect and cyberbullying are vague, and there is a theoretical blind spot. The study employed a combination of social support theory and qualitative comparative analysis to perform configuration analysis, as well as ordered logistic regression for supplementary testing. The study found that the emotional support framework is the trigger for cyberbullying and runs through most paths. The information support framework can induce negative emotions and is a prerequisite for cyberbullying. The tool support framework plays a more auxiliary role in cyberbullying by helping to construct the media environment. Finally, the evaluation support framework has a restraining effect on cyberbullying, though its effectiveness is affected by emotional fluctuations. Official intervention significantly impacts cases involving intense emotional turmoil, while artificial intelligence intervention and official media agenda-setting can suppress cyberbullying by shifting attention and defusing polarized positions. This study clarifies the process from the emergence of group polarisation tendencies to the development of cyberbullying, constructs a mechanism for integrating cyberbullying group dynamics, and provides a theoretical basis for cyberspace governance.

Key words: Cyberbullying, Social networking, Group polarization, QCA, Ordered logistic regression, Media