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The hypothesis seeks to explain the "hyperfocus" aspect of ADHD, the distractibility factor in ADHD, the short attention span individuals with ADHD have for subjects that do not interest them (which may or may not trigger hyperfocus), and various other characteristics related to ADHD (namely, hyperactivity and impulsivity). [2]
The American Psychiatric Association considers "...Disinhibited Social Engagement Disorder more closely resembles ADHD; it may occur in children who do not necessarily lack attachments and may have established or even secure attachments. The two disorders differ in other important ways, including correlates, course, and response to intervention ...
A 2020 review found that creativity may be associated with ADHD symptoms, particularly divergent thinking and quantity of creative achievements, but not with the disorder of ADHD itself – i.e. it has not been found to be increased in people diagnosed with the disorder, only in people with subclinical symptoms or those that possess traits ...
The prevalence of ADHD within the age group of 5-11 years for both male and female children is 8.6%, whereas children in the age group of 12-17 years is 14.3%. [ 37 ] This difference between genders may reflect either a difference in susceptibility or that females with ADHD are less likely to be diagnosed than males. [ 38 ]
Mendelian traits behave according to the model of monogenic or simple gene inheritance in which one gene corresponds to one trait. Discrete traits (as opposed to continuously varying traits such as height) with simple Mendelian inheritance patterns are relatively rare in nature, and many of the clearest examples in humans cause disorders.
However, some people tan more easily than others, due to differences in their genotype: [5] a striking example is people with the inherited trait of albinism, who do not tan at all and are very sensitive to sunburn. [6] Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information. [2]
This meant up to 10% of children in the U.S. were described as having ADHD. Current estimates suggest that ADHD is present internationally in about 7.2% of children. [33] ADHD is diagnosed around 5 times more often in boys than girls. Reasons for this disparity are debated, but likely involve both biological and social/diagnostic factors.
For example, the notion of heritability is easily misunderstood to imply causality, or that some behaviour or condition is determined by one's genetic endowment. [79] When behavioural genetics researchers say that a behaviour is X% heritable, that does not mean that genetics causes, determines, or fixes up to X% of the behaviour.