This study uses the NEO Five-Factor Inventory, combined with the types of reports and
the situations of delivering “bullet screen”, to formulate a questionnaire reflecting the causes of group
polarization in the age of “bullet screen”. The purpose is to explore the causes of group polarization by
investigating internal causes, and to get the internal factors that influence the audience’s comments by
analyzing the results reflected by the questionnaire. The results show that, both internal and external
causes have significant effect on the viewpoint of the audience.