4 ms·

Dog intelligence is not measure by a single number on a test designed with factor analysis. Dog intelligence is basically a vague scent people give to them loos

Dog intelligence is not measure by a single number on a test designed with factor analysis. Dog intelligence is basically a vague scent people give to them loosely based on how obedient they are. And dogs have also been explicitly breed by this vague scent. Humans have never been breed to score differently on an IQ test (although some eugenicist really wanted to). As for the twin studies, they have been largely debunked at this point. There is an inherit bias (pun not intended) where twins are much more likely to be adopted into a specific socio-economic group—confirming the fact that IQ measures social status more then intelligence (for some arbitrary definition of intelligence). But on top of that, it turned out that twin-studies were reeked bad science, everything from forged data to biased sampling. Like I said, this isn’t science, it is pseudo-science, there is nothing to explore except for historians showing how easily scientific racism was endorsed by academia for well over a century.

kolinko 4y ago
Huh? Twin studies and adoption studies are two different things, and you are talking about twins being adopted? Also - are claiming that intelligence is a purely social construct? I would need a citation on that, because as far as I know it was always considered to be inherited.
- runarberg 4y ago
  As far as I’m aware the gold standard for estimating the heritability of intelligence are twins that have been adopted into different families. You compare the variance of monozygotic twins adopted into separate families to the variance of dizygotic. If there is greater variance between dizygotic twins you can conclude, since the monozygotic twins share close to 100% of their genes, that the diminished variability can be explained with their shared genes. However, like I said, there are problems with this assumption, mostly from sampling bias. But you can also argue that the twins share environment while in the womb, the bacterial environment actually interacts with your genome so the shared genome is not actually 50% vs. 100% but somewhat lower. But my problem is actually related to the definition of intelligence. There is no consensus that IQ is an accurate estimate of intelligence, far from it.

kolinko 4y ago

Huh? Twin studies and adoption studies are two different things, and you are talking about twins being adopted? Also - are claiming that intelligence is a purely social construct? I would need a citation on that, because as far as I know it was always considered to be inherited.

runarberg 4y ago
As far as I’m aware the gold standard for estimating the heritability of intelligence are twins that have been adopted into different families. You compare the variance of monozygotic twins adopted into separate families to the variance of dizygotic. If there is greater variance between dizygotic twins you can conclude, since the monozygotic twins share close to 100% of their genes, that the diminished variability can be explained with their shared genes. However, like I said, there are problems with this assumption, mostly from sampling bias. But you can also argue that the twins share environment while in the womb, the bacterial environment actually interacts with your genome so the shared genome is not actually 50% vs. 100% but somewhat lower. But my problem is actually related to the definition of intelligence. There is no consensus that IQ is an accurate estimate of intelligence, far from it.