There is no formal test for the diagnosis of Attention Deficit Hyperactivity disorder. It cannot be identified by a lab test or seen on an x-ray. ADHD can only be diagnosed by looking for certain characteristic behaviors or symptoms that are usually apparent before the age of seven. These symptoms come in many forms, differ from person to person and tend to morph as a person passes from one stage of life to the next. ADHD in adults is sometimes referred to as the "hidden disorder" because the symptoms typically appear in the form of problems with relationships, organization, mood disorders, substance abuse, employment or other psychological difficulties
Doctors make a distinction between symptoms by classifying ADHD diagnosis into three subtypes: inattention, hyperactivity, and impulsivity.While most people with ADHD experience a combination of all three subtypes, there is usually one symptom pattern that stands out.
1. Inattention: People with ADHD who are inattentive display difficulty keeping their mind on any one thing. They may get bored easily with a task and bounce from one task to another. Organizing and completing a task proves troublesome, though they may give undivided and effortless attention to activities and topics they enjoy. People with ADHD often find that focusing deliberate, conscious attention to learning something new is extremely difficult.
2. Hyperactivity: People who display the symptoms of hyperactivity always seem to be in motion. Sitting still may be difficult. They may dash around, squirm in their seats, roam around the room or talk incessantly. They often do repetitive motions like wiggling their feet or tapping their pencil to bring them back to focus and burn off excessive energy. Many people who display the symptoms of Attention Deficit Disorder with hyperactivity feel intensely restless, fidget and may try to do several things at once, alternating from one activity to the next.
3. Impulsivity: People with ADHD who are overly impulsive seem unable to curb their immediate reactions or think before they act. As a result, they may blurt out inappropriate comments, display their emotions without restraint or act without regard for the consequences of their conduct. They may find it difficult to restrain from interrupting others and waiting for anything can be tortuous. Their impulsivity may make it hard for them to accomplish tasks in which gratification is delayed.