Re:Unsteady income in young adulthood linked to thinking pro...
by Mirioron on Friday October 04, 2019 @05:45PM
(#21162163)
>What causes low IQ though? Just going to take a guess here and say that < 5% of people actually have "genetic stupidity". Most "low IQ" people are low IQ because they went through traumatizing hardships early in life.
I think your statement is unlikely to be true. It will, of course, depend on your specific definitions, but from twin studies we've found that intelligence seems to be heritable.[0] It's even a fairly strong effect:
>The heritability of intelligence increases from about 20% in infancy to perhaps 80% in later adulthood.[0]
Other studies have found a similar effect.[1][2] Due to us observing this kind of a heritability effect (one that grows stronger as we age), I think it's unlikely that random events, such as trauma and hardships, are the main cause for lower levels of cognitive development. They certainly play a role in it, because they absolutely do affect cognitive development negatively, but I wouldn't bet money on this being the main reason.
Note that even though [2] favors the maternal womb environment over genetics as a factor in intelligence, it's still a factor that the individual in question had no control over.
>Yeah, no shit. People are too busy trying to survive instead of trying to figure out life's "truths".
I think in this case the parent was referring to people who discuss and solve these kinds of problems, rather than the people actually going through them.
I think your statement is unlikely to be true. It will, of course, depend on your specific definitions, but from twin studies we've found that intelligence seems to be heritable.[0] It's even a fairly strong effect:
>The heritability of intelligence increases from about 20% in infancy to perhaps 80% in later adulthood.[0]
Other studies have found a similar effect.[1][2] Due to us observing this kind of a heritability effect (one that grows stronger as we age), I think it's unlikely that random events, such as trauma and hardships, are the main cause for lower levels of cognitive development. They certainly play a role in it, because they absolutely do affect cognitive development negatively, but I wouldn't bet money on this being the main reason.
Note that even though [2] favors the maternal womb environment over genetics as a factor in intelligence, it's still a factor that the individual in question had no control over.
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4270739/
[1] https://www.ncbi.nlm.nih.gov/pubmed/24791031
[2] https://www.ncbi.nlm.nih.gov/pubmed/9242404
>Yeah, no shit. People are too busy trying to survive instead of trying to figure out life's "truths".
I think in this case the parent was referring to people who discuss and solve these kinds of problems, rather than the people actually going through them.