Plenty of attention has been given to those individuals who have a deficit of attention. Daydreaming, hyperactive, inattentive, unfocused, overly energetic, creative, risk loving, thrill seeking, sluggish, distracted, forgetful, bored and just imaginative children and adults have ended up being labeled as suffering from Attention Deficit Disorder (ADD) and Attention Deficit Hyperactivity Disorder (ADHD). The confusion goes beyond the name to include how to diagnose of someone who may need help in focusing attention. The difference between ADD and ADHD is both simple semantics and classification by symptoms.
The main difference between the terms is subjective, based on observations whether the person is hyperactive, inattentive and impulsive.