Attention Deficit Disorder can be characterized by the following symptoms of inattention which are present for at least six months:

• Difficulty paying close attention to details or careless mistakes in schoolwork, work, or other activities.
• Difficulty keeping attention on tasks or play activities.
• Does not seem to listen when spoken to directly.
• Does not follow instructions and fails to finish schoolwork, chores, or work duties (not due to oppositional behavior or failure to understand instructions).
• Difficulty organizing activities.
• Avoids, dislikes, or doesn't want to do things that take sustained mental effort.
• Loses things needed for tasks and activities (e.g. toys, school assignments, pencils, books, or tools).
• Easily distracted.
• Forgetfulness in daily activities.

Attention Deficit Hyperactivity Disorder is also characterized by the following symptoms of hyperactivity which are present for at least six months:

• Fidgets with hands or feet or squirms.
• Difficulty staying in seat when expected.
• Restlessness, for children - running or climbing about when it is not appropriate.
• Difficulty playing or enjoying leisure activities quietly.
• Acts as if "driven by a motor" and is constantly "on the go."
• Escessive talking.

Symptoms of impulsivity also include:

• Blurting out answers before questions have been finished.
• Difficulty waiting turns.
• Interrupting or intruding on others.