“…Low levels of effortful control have been linked to the externalizing disorders (Eisenberg et al, 2001;Hill, Degnan, Calkin, & Keane, 2006;Oldehinkel et al, 2004). While children's low effortful control predicted higher risk for developing attention problems, aggressive behaviors, and destructive behaviors (e.g., Kochanska & Knaack, 2004;Olson, Sameroff, Kerr, Lopez, & Wellman, 2005), high levels of effortful control acted as a protective factor against aggressive behaviors (Eisenberg, Fabes, Nyman, Bernzweig, & Pinuelas, 1994;Lengua, 2006).…”