ADD is a neurological disorder that affects the central nervous system.
It is often thought to be hereditary in nature. Although ADD is no longer considered only a childhood condition, the diagnosis is not given unless some of the symptoms have been present prior to the age of seven. In addition, symptoms of the disorder must be present in at least two different settings, and there must be interference with appropriate academic, occupational or social functioning. Studies have suggested that differences in brain structure and neurotransmitter chemicals may also be contributing factors. Identifying ADD in College Students.