ADD with hyperactivity is characterized by symptoms of inattention, impulsivity and hyperactivity which has an onset before age seven, which persist for at least six months, and which is not due primarily to other psychiatric disorders or environmental circumstance, such as reaction to family stresses.

The primary characteristic of ADD without hyperactivity is significant inattentiveness. Studies of children with this diagnosis indicate that they show more signs of anxiety and learning problems, and qualitatively different inattention. Although there have been no adult follow-up studies, it is projected that children who have ADD without hyperactivity may have different outcomes than the hyperactive group, who show more externalizing behavior problems associated with oppositional and conduct disorders. - ADD/ADHD

This website contains a wealth of information on Adult ADD/ADHD. It includes information on getting help, possible medications available and some self-help tips.

Attention Deficit Information (CHADD)

"CHADD (Children and Adults with Attention-Deficit/Hyperactivity Disorder) is the nation’s leading non-profit organization serving individuals with ADHD and their families. CHADD has over 16,000 members in 200 local chapters throughout the U.S. Chapters offer support for individuals, parents, teachers, professionals, and others.