“…Narcissism has been demonstrated to differentiate between aggressive and non-aggressive students (Ang & Yusof, 2005), and to predict delinquency and be associated with future externalizing behaviors in children (Donnellan, Trzesniewski, Robins, Moffitt, & Caspi, 2005). Barry and colleagues Barry, Frick et al, 2007;Barry, Thompson et al, 2007;Barry, Pickard, & Ansel, 2009) examined the relationship between narcissism and self-esteem in predicting delinquency, conduct problems, overt aggression and relational aggression in a series of studies.…”