High Quality Content by WIKIPEDIA articles! The causes, diagnosis, and the treatment of attention-deficit hyperactivity disorder (ADHD) have been the subject of active debate at least since the 1970s. For various reasons, ADHD remains one of the most controversial psychiatric disorders despite being a well validated clinical diagnosis. Possible overdiagnosis of ADHD, the use of stimulant medications in children, and the methods by which ADHD is diagnosed and treated are some of the main areas of controversy.