[QUOTE=Jacuzzme;1063453347]
Quote:
Originally Posted by adav8s28
So, if the test score
Pages 253-255.
Not cool, and why it’s impossible to have a legitimate conversation about the subject.
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I looked at pages 253 - 255. There is no proof that having more neural connections (synapses) results in a higher I/Q test score. From the bottom of pg 255.
Rushton (2000; Rushton & Ankney, 1996) summarized the world database
using the three methods on which there are a sufficient number of studies
(autopsies, endocranial volume, and head measurements), as well as head measurements corrected for body size (see Rushton, 2000, pp. 126–132, Table 6.6).
The results in cm3 or equivalents were as follows: East Asians 1,351, 1,415,
1,335, and 1,356 (M 1,364); Whites 1,356, 1,362, 1,341, and 1,329 (M
1,347); and Blacks 1,223, 1,268, 1,284, and 1,294 (M 1,267). The overall
mean for East Asians is 17 cm3 more than that for Whites and 97 cm3 more than
that for Blacks. Within-race differences due to differences in method of estimation
averaged 31 cm3
. Because 1 cubic inch of brain matter contains millions of brain
cells and hundreds of millions of synapses or neural connections, these group
differences in average brain size may explain group differences in average IQ.
Those differences in I/Q test scores taken during WW1 are most likely due to environmental factors. Only the black group had to experience "Jim Crow". WWI was a peak time for Jim Crow.