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Furthermore, a recent 2020 study found that ADHD allele frequency has been decreasing for up to 35,000 years, indicating negative selection. [8] These conclusions, however, are still compatible with the theory: "Overall, our results are compatible with the mismatch theory for ADHD but suggest a much older time frame for the evolution of ADHD ...
A meta-analysis of the global prevalence of ADHD in adults, published in 2021, estimated a collective prevalence of persistent adult ADHD of 2.58% globally in 2020. [4] Persistent adult ADHD is defined as meeting diagnostic criteria for ADHD in adulthood with the additional requirement of a confirmed childhood diagnosis. [4]
Often avoids, dislikes, or doesn't want to do things that take a lot of mental effort for a long period (such as schoolwork or homework). Often loses things needed for tasks and activities (e.g. toys, school assignments, pencils, books, or tools). Is often easily distracted. Is often forgetful in daily activities. [7]
screen for ADHD The Test of Variables of Attention (T.O.V.A.) is a neuropsychological assessment that measures a person's attention while screening for attention deficit hyperactivity disorder . Generally, the test is 21.6 minutes long and is presented as a simple, yet boring, computer game.
The ADHD Rating Scale (ADHD-RS) is a parent-report or teacher-report inventory created by George J. DuPaul, Thomas J. Power, Arthur D. Anastopoulos, and Robert Reid [1] consisting of 18–90 questions regarding a child's behavior over the past 6 months. [1]
ADHD inattentive type: Must score either a 2 or 3 on six or more items in questions 1–9, and score of 1 or 2 on any items in the performance section. ADHD hyperactive/impulsive type: Must score either a 2 or 3 on six or more items in questions 10–18, and a score of 1 or 2 on any items in the performance section.
Some ADHD symptoms in adults differ from those seen in children. While children with ADHD may climb and run about excessively, adults may experience an inability to relax, or may talk excessively in social situations. [57]: 6 Adults with ADHD may start relationships impulsively, display sensation-seeking behaviour, and be short-tempered.