5 ms·
I don't see the word 'IQ' mentioned anywhere in that article. And yet, it's the single biggest determinant of lifetime success. Unfortunately, it's also highly
by johnrichardson 8y ago
I don't see the word 'IQ' mentioned anywhere in that article. And yet, it's the single biggest determinant of lifetime success. Unfortunately, it's also highly heritable, so environmental interventions have a fairly marginal effect on it.
- deleted 8y ago[deleted]
- pulisse 8y agoUnfortunately, it's also highly heritable, so environmental interventions have a fairly marginal effect on it. (a) The Flynn Effect demonstrates that IQ is quite responsive to environment. (b) The heritability of a trait is not a measure of the degree to which that trait is genetically determined: Highly heritable traits can be environmently malleable. (The heritability of height is 0.8, but nutrition, childhood sickness, etc. have a huge effect on height.) Conversely, traits with low heritability can be strongly determined, genetically. ("Number of eyes" is a trait with low heritability, for example.) (c) The measured heritability of IQ isn't especially high. It's usually found to be in the vicinity of 0.3.
- lazerpants 8y agoRegarding C, isn't that just for children? As I recall it's something like 0.5 or higher for adults.
- johnrichardson 8y agoYou're right. Some studies have found it as high as 85%. https://en.wikipedia.org/wiki/Heritability_of_IQ https://en.wikipedia.org/wiki/Heritability_of_IQ