“…Much current research is focused on aggression at home, schools, and adolescent violence (Al Saleh, 2012;Al-Sarayreh, 2009;Shechtman & Ifargan, 2009). A number of previous studies have also examined causes of aggression in preschool (Daly & Perez, 2009;Doumen, Verschueren, Buyse, & Germeijs, 2009;Posada & Pratt, 2008;Sakimura et al, 2008;Thornberg, 2006). For example, Sakimura et al (2008) investigated the co-occurrence of cognitive problems and difficult temperament characteristics in children with aggressive behavior.…”