1. Home
  2. Education
  3. Psychology

What Is ADHD?

By , About.com Guide

Question: What Is ADHD?
Answer:
  • Attention Deficit Hyperactivity Disorder (ADHD) is a behavioral and developmental disorder.

  • ADHD usually becomes apparent during the preschool and early school years.

  • Children with ADHD have difficulty paying attention and controlling their behavior.

  • Some estimates show that between 3 and 5 percent of children have ADHD, or approximately 2 million children in the United States.

  • Based on these estimates, at least one child in a classroom of 25 to 30 children is likely to have ADHD.

History of ADHD

Dr. Heinrich Hoffman in 1845 first described ADHD in a children’s book, “The Story of Fidgety Philip,” which contained an accurate description of a child with attention deficit hyperactivity disorder.

In 1902, Sir George F. Still provided the first clinical description of the disorder in a series of papers about a group of children who displayed impulsivity and behavior problems. According to Still, these symptoms were caused by a genetic dysfunction and not by poor parenting. Since that time, a wealth of research on the symptoms, causes, and treatments for ADHD has been published.

Source: (1996) Attention Deficit Hyperactivity Disorder National Institute of Mental Health

>>Next: Symptoms of ADHD

Explore Psychology

About.com Special Features

A Smarter Future

Tips that will help finance your education, excel in the classroom, and advance your career. More >

How to Ace the GRE

Being well prepared is the first step; here are more essential suggestions. More >

  1. Home
  2. Education
  3. Psychology
  4. Psychology Dictionary
  5. A Index
  6. What Is ADHD?>

©2009 About.com, a part of The New York Times Company.

All rights reserved.