One of the most commonly diagnosed childhood disorders referred to mental health clinicians is ADHD. It is a complicated neurodevelopmental psychiatric disorder and has an estimated range of occurrence of 2 to 3 percent of the school population and up to 10 percent in other settings. Thus, on average a minimum of at least one child with ADHD and executive functioning disorders is in each classroom in American schools. (Reddy et al.) Rowland, Leswesne, & Abramowitz (2002) indicated that prevalence rates for ADHD vary markedly based on presenting symptoms, assessment approaches used, and the setting in which the child was tested. A lack of a consensus on what constitutes the core set of symptoms for ADHD confounds the screening and assessment process (Brown, 2002).
