“…Studies using the PRQ distinguish four bystander roles: assistants of the bully, reinforcers of the bully, outsiders, and defenders of the victim (Gini, 2006; Salmivalli et al, 1998; Sutton & Smith, 1999). As assistants and reinforcers play an active role in reinforcing bullying, these two roles have been assigned as one factor based on factor analysis, such that bystanders’ responses can be categorized into follower, outsider, and defender, with the roles of assistants and reinforcers combined to form the follower category (Baek, 2014; Goossens et al, 2006; Heo, 2019; Seo, 2015).…”