“…(1) stated costs and benefits of aggressive acts (Archer & Southall, 2009;Archer, Fernández-Fuertes, & Thanzami, 2010;Rutter & Hine, 2005), (2) instrumental and expressive beliefs about aggression (Archer & Haigh, 1997a;Archer & Graham-Kevan, 2003;Campbell, Muncer & Gorman., 1992), (3) self-control (Stanford, Houston, Villemarette-Pitman, & Greve, 2003), (4) empathy (e.g. Jolliffe & Farrington, 2004), (5) anxiety (e.g., Taft et al, 2006) and (5) psychopathic traits (e.g., Reidy, Zeichner & Martinez, 2008).…”