“…In addition some research has found persistent low intelligence and deficits in executive functioning among delinquent children compared to the general population (Frick & Viding, 2009;Lynam & Henry, 2001;Moffitt, 2006). However, some experts have argued that studies showing a significant relation between deficits in executive functioning or low IQ and behavior disorders have failed to control for comorbid ADHD (Burke, Loeber, & Birmaher, 2002;Hogan, 1999). Indeed, when studies control for ADHD, the relation between ODD and CD to weak neuropsychological functioning tends to either disappear or become nonsignificant (Clark et al, 2000;Klorman et al, 1999;Kuhne, Schachar, & Tannock, 1997;Mayes & Calhoun, 2007;van Goozen et al, 2004).…”