(“biological hypothesis” is the one which says biology strongly affects IQ):
Note that some forms of the “biological hypothesis” are especially hard to refute. Few people disagree that eating too much lead paint as a child will give you a low IQ. If black kids eat a lot more lead paint than white kids, the end result will be that blacks will on average be rather bad at science, and scholarship in general.
The biological hypothesis pretty much means genetics. There are a lot of environmental influences (from eating lead paint chips to being deficient in iodine to being dropped on one’s head as a child) that are well-known to affect IQ.
Note that some forms of the “biological hypothesis” are especially hard to refute. Few people disagree that eating too much lead paint as a child will give you a low IQ. If black kids eat a lot more lead paint than white kids, the end result will be that blacks will on average be rather bad at science, and scholarship in general.
The biological hypothesis pretty much means genetics. There are a lot of environmental influences (from eating lead paint chips to being deficient in iodine to being dropped on one’s head as a child) that are well-known to affect IQ.