That is some environmental effect, there's no genetic.
If, if, if there were selective placement, that's some
sort of matching of the biological background with, with the
rearing background, I, I suppose there's a possibility that
could reflect a genetic mechanism, but it's not really likely.
So that in all likelihood is an environmental factor, something about
the environment of growing up in a home with an adopted parent.
So it is what statisticians, a technical term
here, what statisticians would call a main effect.
It's a main effect of the adopted family background.
If you have an adopted parent with drug abuse, you're
more likely to develop drug abuse than if you don't.
The point, the larger point I think Lisa's raising here is an important one.
It's one we begin to touch on in this week,
week 3 not week 2 and that is, well maybe,
having an adoptive parent with drug abuse is a greater
risk factor if you have a biological background of drug abuse
>> Mm.
>> Than if you do not.
And in fact, I think that's really
insightful, Lisa, that you, you identified that issue.
I didn't talk about it in this lecture, but
in fact that is what they found in this study.
That is, when they looked at adopted children who had a birth parent with drug
abuse, those children were more likely to develop
drug abuse if they had an adoptive parent.
That is, growing up in a home with
an adoptive parent was, there was a synergy there.
There was what we would technically call an interaction.
That it was a greater risk for them to be placed in a home of an adoptive parent
with drug abuse than a child that didn't have that birth background of drug abuse.