Attention Deficit Hyperactivity Disorder (ADHD) is a developmental disorder. Its characteristics are not uniform, but can include, as the name implies, hyperactivity, short attention spans, and distractability.Contrary to popular belief, ADHD does not just affect children, though its symptoms often manifest themselves in school settings, for obvious reasons. People with ADHD often display such behaviors as fidgeting, daydreaming, kinetic activity like running (often in inappropriate situations) and a variety of developmentally inappropriate behaviors. They often feel restless and anxious, and may have trouble keeping schedules or completing assigned tasks on time. The condition is most often found in males, and while the cause is not known (many scientists believe it is due to chemical imbalances in the brain) there are known correlations that suggest heredity. Treatments can involve medication, particularly stimulants like Ritalin, but there is an increasing call among medical specialists and educators to treat ADHD by altering environments to better accomodate many of the behaviors associated with ADHD, which is often exacerbated by stress, repetitve activity, and boredom.