<P> Rates of diagnosis and treatment have increased in both the United Kingdom and the United States since the 1970s . This is believed to be primarily due to changes in how the condition is diagnosed and how readily people are willing to treat it with medications rather than a true change in how common the condition is . It is believed that changes to the diagnostic criteria in 2013 with the release of the DSM - 5 will increase the percentage of people diagnosed with ADHD, especially among adults . </P> <P> Hyperactivity has long been part of the human condition . Sir Alexander Crichton describes "mental restlessness" in his book An inquiry into the nature and origin of mental derangement written in 1798 . ADHD was first clearly described by George Still in 1902 . </P> <P> The terminology used to describe the condition has changed over time and has included: in the DSM - I (1952) "minimal brain dysfunction," in the DSM - II (1968) "hyperkinetic reaction of childhood," and in the DSM - III (1980) "attention - deficit disorder (ADD) with or without hyperactivity ." In 1987 this was changed to ADHD in the DSM - III - R and the DSM - IV in 1994 split the diagnosis into three subtypes, ADHD inattentive type, ADHD hyperactive - impulsive type and ADHD combined type . These terms were kept in the DSM - 5 in 2013 . Other terms have included "minimal brain damage" used in the 1930s . </P> <P> The use of stimulants to treat ADHD was first described in 1937 . In 1934, Benzedrine became the first amphetamine medication approved for use in the United States . Methylphenidate was introduced in the 1950s, and enantiopure dextroamphetamine in the 1970s . </P>

Which of the following statements about attention-deficit/hyperactivity disorder (adhd) is false