/sci/ - Science & Math

>>9107783
forgot pic

also I dont understand OP's question really
there are black scientists - famous and lesser known

His question is why weren't there black scientists in 19th and early 20th century, when relatively easy and accessible things were being discovered - for that go ask historians

>>9069637
>Asians are not born with extra genetical brain cells
yes they absolutely are

>>8927120
this data rushton took from studies, so the only likely bias is in favor of your pov btw - rushton is the secondary source, primary source is US perinatal study
small differences between races

>https://en.wikipedia.org/wiki/Brain_size
a caucasian male brain varies between 1050 to 1500 with a mean of 1260 - most of the variation is within groups

>Studies demonstrate a correlation between brain size and intelligence, with larger brains predicting higher intelligence. It is however not clear if the correlation is causal.[29] The majority of MRI studies report moderate correlations around 0.3 to 0.4 between brain volume and intelligence.[30][31] The most consistent associations are observed within the frontal, temporal, and parietal lobes, the hippocampus, and the cerebellum, but only account for a relatively small amount of variance in IQ, which suggests that while brain size may be related to human intelligence, other factors also play a role.[31][32] In addition, brain volumes do not correlate strongly with other and more specific cognitive measures.[2]

let's say the relationship is casual - between size and intelligence(if we don't then argument ends here lol)
a correlation of 0.35 means that about 12% of the variance in intelligence is explainable by brain size
if you look at the studies, they include mostly Caucasians - ranging from 1050 to 1500(a variance much higher than that between races)

actually assuming non-caucasian races vary as much and in a similar manner around their own means (a reasonable assumption, for example in a normal distribution) you'd see that mean difference in brain size between groups is insignificant and unable to cause large iq gaps

if the iq gaps are genetic, the effect isn't through brain size.

you asked for it

this data rushton took from studies, so the only likely bias is in favor of your pov btw - rushton is the secondary source, primary source is US perinatal study
small differences between races

>https://en.wikipedia.org/wiki/Brain_size
a caucasian male brain varies between 1050 to 1500 with a mean of 1260 - most of the variation is within groups

>Studies demonstrate a correlation between brain size and intelligence, with larger brains predicting higher intelligence. It is however not clear if the correlation is causal.[29] The majority of MRI studies report moderate correlations around 0.3 to 0.4 between brain volume and intelligence.[30][31] The most consistent associations are observed within the frontal, temporal, and parietal lobes, the hippocampus, and the cerebellum, but only account for a relatively small amount of variance in IQ, which suggests that while brain size may be related to human intelligence, other factors also play a role.[31][32] In addition, brain volumes do not correlate strongly with other and more specific cognitive measures.[2]

let's say the relationship is casual - between size and intelligence(if we don't then argument ends here lol)
a correlation of 0.35 means that about 12% of the variance in intelligence is explainable by brain size
if you look at the studies, they include mostly Caucasians - ranging from 1050 to 1500(a variance much higher than that between races)

actually assuming non-caucasian races vary as much and in a similar manner around their own means (a reasonable assumption, for example in a normal distribution) you'd see that mean difference in brain size between groups is insignificant and unable to cause large iq gaps

if the iq gaps are genetic, the effect isn't through brain size.

>>8898548
>>All studies show large gaps in white and black cranial capacity
if you adjust for body size the only large gap is found between two other groups

this data rushton took from studies, so the only likely bias is in favor of your pov btw - rushton is the secondary source, primary source is US perinatal study

i wouldn't say differences are super significant
according to (contains sources)
>https://en.wikipedia.org/wiki/Brain_size

a caucasian male brain varies between 1050 to 1500 with a mean of 1260 - most of the variation is within groups