Healing Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD) Attention deficit hyperactivity disorder (ADHD), or attention deficit disorder (ADD) with hyperactivity, is the newest name given to a group of disorders of certain mechanisms in the central nervous system. ADD/ADHD is the fastest growing childhood disorder in the United States, reportedly affecting an astounding 9 – 10 percent of all school-aged children. Ten times more boys than girls are diagnosed with ADD or ADHD. Although primarily thought of as a childhood disorder, ADD/ADHD can be found in adults as well. It causes a variety of learning and behavioural problems, often making it difficult not only for the affected.