Attention deficit hyperactivity disorder (ADHD) is one of the most common types of childhood disorders. Individuals with ADHD exhibit attention problems as well as hyperactive and impulsive behaviors. Children and adolescents with ADHD may have difficulty sitting still, listening to instructions or classroom lectures, organizing materials, completing schoolwork or homework, or playing or engaging in activities quietly. These individuals frequently make careless mistakes in their schoolwork or they may forget or lose things.

According to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition-Text Revision (DSM-IV-TR) (American Psychiatric Association, 2000), there are three subtypes of ADHD:

• 1.
  ADHD, Predominantly Inattentive Type
• 2.
  ADHD, Predominantly Hyperactive-Impulsive Type
• 3.
  ADHD, Combined Type

The ADHD, Combined Type is the most common, and individuals with this subtype exhibit inattentive and hyperactive-impulsive behaviors. To ...