well-done rigorous studies (i.e. those done with twins and/or adoption studies) mostly find that almost every aspect of offspring traits has a large genetic component and almost zero shared environment component.
These traits range from cognitive (like IQ) to degree of spirituality to traits like anxiety (which are harder to measure, hence the correlation coefficients can occasionally be lower due to measurement error). Indeed, it is hard to find traits that do not have a large genetic component! (interestingly homosexuality often regarded as the genetic trait par excellence has one of the lowest genetic components of common traits)
Yes children whose biological parents have a PhD are much more likely to have a PhD. How does this prove that parenting style is the mediating force as opposed to genes?
Severe abuse can certainly hurt children—it is easier to fuck something up than to significantly improve on a natural process. But the abuse has to be quite severe to have a measurable impact on long-term life outcomes—although of course it will still be an awful experience and memory for the child (and obviously I’m not saying you should abuse your child!).
There is indeed a fad to ascribe all kinds of maladies to this or that happening in childhood. Actually, this idea is quite age old (Freud?). Doesn’t make it true though. Well-done studies that control for genetic components as opposed to shoddy studies or anecdotes mostly don’t pick up on any of the effects that these theories claim (outside of severe abuse). Certainly, it seems plausible on the face of it and it is undeniably popular—but the lack of strong scientific evidence for these theories should make on skeptical.
Differences between the First and Third world are so large that these have very large effect on life trajectories.
If one believes the actual research done on this question then one can only conclude that the differences between middle-class parenting styles in the First World outside of severe abuse don’t make much difference in long-term outcomes for the child.
To be fair, it had never occurred to me that completing a PhD could be genetically driven… It seems quite plausible, actually (however, not completing one seems much less correlated to me).
Yes, I’m more skeptical now! Still, I’m also skeptical of these studies, though (maybe because I have not reviewed them myself—nothing persona!--, which I actually doubt I will do...).
AFAIK, there were very well know studies strongly relating IQ to genes (which implied that e.g. black people have lower IQ) that are now being refuted and the new ones link it much more to the socio-economic status of the family. I guess the difference is only the degree of correlation (you say it yourself that socio-economic status has an impact), but what I heard/read is that difference is quite large.
In addition, I can not square these studies you mention with other good research. E.g. gratitude journaling seem to have a huge effect improving mental health, and this is something that can be easily taught at home.
My guess to put everything together is now that the world is very messy, such effects very difficult to measure, and that most education is good enough to avoid trauma but still very sub-optimal (difficult to find the signal within lots of noise). In addition, probably, educating techniques work differently for different children (which would not be surprising and would largely explain that education is sub-optimal).
well-done rigorous studies (i.e. those done with twins and/or adoption studies) mostly find that almost every aspect of offspring traits has a large genetic component and almost zero shared environment component.
These traits range from cognitive (like IQ) to degree of spirituality to traits like anxiety (which are harder to measure, hence the correlation coefficients can occasionally be lower due to measurement error). Indeed, it is hard to find traits that do not have a large genetic component! (interestingly homosexuality often regarded as the genetic trait par excellence has one of the lowest genetic components of common traits)
Yes children whose biological parents have a PhD are much more likely to have a PhD. How does this prove that parenting style is the mediating force as opposed to genes?
Severe abuse can certainly hurt children—it is easier to fuck something up than to significantly improve on a natural process. But the abuse has to be quite severe to have a measurable impact on long-term life outcomes—although of course it will still be an awful experience and memory for the child (and obviously I’m not saying you should abuse your child!).
There is indeed a fad to ascribe all kinds of maladies to this or that happening in childhood. Actually, this idea is quite age old (Freud?). Doesn’t make it true though. Well-done studies that control for genetic components as opposed to shoddy studies or anecdotes mostly don’t pick up on any of the effects that these theories claim (outside of severe abuse). Certainly, it seems plausible on the face of it and it is undeniably popular—but the lack of strong scientific evidence for these theories should make on skeptical.
Differences between the First and Third world are so large that these have very large effect on life trajectories.
If one believes the actual research done on this question then one can only conclude that the differences between middle-class parenting styles in the First World outside of severe abuse don’t make much difference in long-term outcomes for the child.
Thanks you very much! That’s a great answer!
To be fair, it had never occurred to me that completing a PhD could be genetically driven… It seems quite plausible, actually (however, not completing one seems much less correlated to me).
Yes, I’m more skeptical now! Still, I’m also skeptical of these studies, though (maybe because I have not reviewed them myself—nothing persona!--, which I actually doubt I will do...).
AFAIK, there were very well know studies strongly relating IQ to genes (which implied that e.g. black people have lower IQ) that are now being refuted and the new ones link it much more to the socio-economic status of the family. I guess the difference is only the degree of correlation (you say it yourself that socio-economic status has an impact), but what I heard/read is that difference is quite large.
In addition, I can not square these studies you mention with other good research. E.g. gratitude journaling seem to have a huge effect improving mental health, and this is something that can be easily taught at home.
My guess to put everything together is now that the world is very messy, such effects very difficult to measure, and that most education is good enough to avoid trauma but still very sub-optimal (difficult to find the signal within lots of noise). In addition, probably, educating techniques work differently for different children (which would not be surprising and would largely explain that education is sub-optimal).
I’m interested in your thoughts :-)
Your mental flexibility and willingness to chance your mind is commendable.
I recommend taking a look at Plomin’s “Blueprint”.
https://www.amazon.com/Blueprint-How-DNA-Makes-Press/dp/0262039168
even on IQ short-term gains can be made by intensive training. However, it effects seem to always wash out in the long-term.
Thanks, I’ll take a look.