They show poor ability to keep their attention on tasks, are easily distractable, and often must be told the same thing repeatedly. Teachers will say these children are inattentive, not following through, and not completing their school work. There are similarities and differences. Adults with ADD are also consistently inconsistent. However, ADD in adults is often accompanied by mood problems, anxiety, depression, alcoholism, and substance abuse.
Many people are occasionally forgetful.
The difference for adults with ADD is that the behavior is excessive, long-term, and pervasive. Adults with ADD have experienced these symptoms everyday since childhood. A mental health professional such as a psychologist, psychiatrist, pediatrician or neurologist who is trained and experienced with the disorder can make the diagnosis. The evaluation should include a medical and developmental history, behavior rating forms, and, sometimes, screening for learning problems or emotional problems that can complicate the picture. Another observer, preferably a parent, should confirm the history of symptoms.