It seems likely that as much as environment shapes man, so man selects the environment. Hence in problem families, many problems arise from the behavior and choices of the families themselves. So biological factors like mental illness, conduct disorders, addictions, etc, are relevant, and especially the concept of comorbidity. A family with a genetic predisposition to ADHD will end up with a lot of psychosocial problems, but drugs are an effective treatment for this.
common terms used in NSW (Australia) are "Difficult to engage families" "at risk families" , "hard to reach families", "low socioeconomic family groups", "marginalised families", "at risk families",
Anthony. What is a genetic predisposition to ADHD? Has any conclusive evidence been found to establish that there is such a thing? How are the numerous confounding variables accounted for in any such study? Many aberrant behavioural traits are learned, just as socially acceptable ones are. There is no genetic marker for language learning for instance and children born of Chinese parents and adopted at birth by American foster parents show no genetic predisposition to speak Chinese in spite of there being an obvious genetic connection to the natural parents.
There has never been any conclusive evidence that behaviour is genetically determined. Musical parents often have musical offspring and sporting parents have children who excel in sport. This is learned behaviour not genetic!
I have not been convinced so far that any genetic abnormality has ever been found, only hinted at in the absence of any other convenient biological factor to suit modern prescribing fashions. ADHD was not established by discoveries at a cellular, genetic or molecular level, it was invented at a conference by a show of hands.
"Anthony. What is a genetic predisposition to ADHD?"
From Wikipedia:
"Twin studies indicate that the disorder is often inherited from one's parents with genetics determining about 75% of cases.[14][55][56] Siblings of children with ADHD are three to four times more likely to develop the disorder than siblings of children without the disorder.[57] Genetic factors are also believed to be involved in determining whether or not ADHD persists into adulthood.[58]. Typically a number of genes are involved.."
Incidentally, it is no kindness to deny a genetic component to ADHD, as otherwise the kids are punished for disobedience by teachers, and as if it were not bad enough having to deal with an uncontrollable child, the parents are then blamed for causing the condition.
"children born of Chinese parents and adopted at birth by American foster parents show no genetic predisposition to speak Chinese"
No, but they have higher mean IQ than non-Chinese adopted in the USA.
"There has never been any conclusive evidence that behaviour is genetically determined"
What, theoretically, would you regard as conclusive evidence?
"ADHD was not established by discoveries at a cellular, genetic or molecular level"
Neither were cancer, diabetes, cholera, polio, smallpox, epilepsy, Huntington's chorea, etc, etc.