Dr. Russell Barkley has listed a number of statistics concerning ADHD:

• A classroom with 30 students will have between 1 and 3 children with ADHD.
• Boys are diagnosed with ADHD 3 times more often than girls.
• Emotional development in children with ADHD is 30% slower than in their non-ADD peers. This means that a child that is 10 years old will have the emotional development of a 7 year old, a 20 year old will have the emotional maturity of a 14 year old.
• One fourth of children with ADHD have serious...