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Sex differences in latent cognitive abilities ages 6 to 59: Evidence from the Woodcock–Johnson III tests of cognitive abilities

The higher-order, latent g factor showed inconsistent differences for children, small, non-significant differences favoring females for adolescents, and fairly consistent statistically significant differences favoring females in adulthood. Findings are inconsistent with developmental theory that suggests males should show an advantage on g in adulthood. Supplemental analyses suggested that methodological choices, including the use of latent variables versus composites and methods for dealing with missing data, can affect research findings.
study  psychology  cog-psych  iq  psychometrics  gender  gender-diff  pop-diff  regularizer  multi  twitter  social  commentary  large-factor  developmental 
yesterday by nhaliday
Flynn Effect and Digit Span - Completed - ACCEPTED.pdf
no Flynn effect for working memory

Consequently, if the Flynn effect is occurring, it would appear to be a phenomenon that is completely independent of STMC and WMC, which may be surprising, given the close correspondence between WMC and fluid intelligence.
pdf  study  psychology  cog-psych  psychometrics  iq  trends  flynn  null-result  psych-architecture  intelligence 
2 days ago by nhaliday
Charles Murray is once again peddling junk science about race and IQ - Vox
In Harris’s view, all of this is simply beyond dispute. Murray’s claims about race and intelligence, however, do not stand up to serious critical or empirical examination. But the main point of this brief piece is not merely to rebut Murray’s conclusions per se — although we will do some of that — but rather to consider the faulty path by which he casually proceeds from a few basic premises to the inflammatory conclusion that IQ differences between groups are likely to be at least partly based on inborn genetic differences. These conclusions, Harris and Murray insist, are disputed only by head-in-the-sand elitists afraid of the policy implications.

(In the interview, Murray says he has modified none of his views since the publication of the book, in 1994; if anything, he says, the evidence for his claims has grown stronger. In fact, the field of intelligence has moved far beyond what Murray has been saying for the past 23 years.)
iq  charles_murray  sam_harris  intelligence  genetics  racism 
4 days ago by perich
Nothing else matters | West Hunter
Average IQ scores have gone up a lot over the years, although they seem to be plateauing.

Do I think that people really got smarter over that period? Based on real-world accomplishments? Not one bit. Probably they’ve gotten a bit dumber, from selection, and more than a bit dumber, from demographic change.

Most importantly, math subscores haven’t changed much. “There is a subtest of the Wechsler called Arithmetic. A typical question: If a widget costs 18 cents, and if you buy 3 widgets and give the clerk 1 dollar, how much change should you get back? This is one of the subtests showing the smallest Flynn effect. Over 50 years it showed 0.23-SD increase in adults, whereas Raven’s Matrices showed a 2.39-SD increase. ”

Russia, Trump, foreign policy, China:
west-hunter  scitariat  discussion  science-anxiety  iq  psychology  cog-psych  psychometrics  dysgenics  trends  behavioral-gen  calculation  nitty-gritty  impact  flynn  realness  multi  poast  russia  china  asia  expansionism  foreign-policy  realpolitik  trump  politics  current-events  iraq-syria  prudence 
5 days ago by nhaliday
Charles Murray is once again peddling junk science about race and IQ - Vox
Murray casually concludes that group differences in IQ are genetically based. But what of the actual evidence on the question? Murray makes a rhetorical move that is commonly deployed by people supporting his point of view: They stake out the claim that at least some of the difference between racial groups is genetic, and challenge us to defend the claim that none, absolutely zero, of it is. They know that science is not designed for proving absolute negatives, but we will go this far: There is currently no reason at all to think that any significant portion of the IQ differences among socially defined racial groups is genetic in origin.

Here, too briefly, are some facts to ponder — facts that Murray was not challenged to consider by Harris, who holds a PhD in neuroscience, although they are known to most experts in the field of intelligence.
charlesmurray  race  racism  iq  intelligence  socialscience  cognition  takedowns  samharris 
5 days ago by sampenrose
Say "experts" instead of "smart people" -
In his keynote talk at the PaPoC workshop at EuroSys last week, Peter Bourgon described a ha-ha-only-serious metric for whether an idea could be …
phd  iq 
8 days ago by pmigdal
The Bell Curve EXPLAINED (by Charles Murray)
From the original: here are Murray's abbreviated INTRODUCTION plus the introductory summaries from each chapter
IQ  intelligence  politics 
8 days ago by horbrastar

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