“…Documented prevalence rates for bullying vary greatly across studies, with 10% to 33% of students reporting victimization by peers, and 5% to 13% admitting to bullying others (e.g., Cassidy, 2009;Dulmus, Sowers, & Theriot, 2006;Kessel Schneider, O'Donnell, Stueve, & Coulter, 2012;Nansel et al, 2001;Perkins, Craig, & Perkins, 2011;Peskin, Tortolero, & Markham, 2006). Such variations reflect differences in assessment approaches, as well as differences across individuals (sex, age), contexts, and cultures.…”