People with ADHD also have problems with hyperactivity and impulsivity.
Hyperactivity is simply having a high level of activity or excitement. Impulsivity is defined as acting suddenly on an idea or emotion, without first thinking it through.
In order to diagnose hyperactivity, a person must have had 6 of the following symptoms (5 for individuals older than 17 years):
1. Often fidgets with or taps hands or feet or squirms in seat;
2. Often leaves seat in situations when remaining seated is expected;
3. Often runs about or climbs in situations where it is not appropriate (adolescents or adults may be limited to feeling restless);
4. Often unable to play or take part in leisure activities quietly;
5. Is often "on the go," acting as if "driven by a motor";
6. Often talks excessively;
7. Often blurts out an answer before a question has been completed;
8. Often has trouble waiting for his or her turn;
9. Often interrupts or intrudes on others (e.g., butts into conversations or games).
A diagnosis is based on the symptoms that have occurred over the past 6 months.
American Psychiatric Association, Diagnostic and Statistical Manual of Mental Disorders, 5th ed. Arlington, VA: American Psychiatric Publishing; 2013