On the East Asian > White advantage on scholastic tests

It’s well known that East Asians (Chinese, Japanese, Korean; CJKs) tend to outperform Europeans (‘Whites’) on cognitive tests. If we look at the standard IQ tests, the advantage is about 5 points, give or take. This is found both between and within countries, as summarized Richard Lynn in his Race differences in intelligence book (obligatory reading on…

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Standard deviation of total SAT scores: not simply the sum of the standard deviations of subtests

Someone on Reddit for SlateStarCodex: AFAIK, SATs are normed to mean of 500 per section and standard deviation of 100. Assuming that math and verbal are highly correlated, that approximates to 1000 mean and 200 standard deviation for the SAT 1600 scale. The median reported score score was 1490, and even the 10th percentile was…

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Harvard SAT and IQ: How much regression towards the mean?

Is the SAT an IQ test? Blog commenter Lion of the Judah-sphere has claimed that the SAT does not correlate as well with comprehensive IQ tests as said IQ tests correlate with one another. At first I assumed he was wrong, but my recent analysis suggesting Harvard undergrads have an average Wechsler IQ of 122, really…

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Examining the S factor in US states

Abstract A dataset of 25 diverse socioeconomic indicators for US states was compiled and subjected to factor analysis. Results showed that Washington DC was a strong outlier, but if it is excluded, then the S factor correlated strongly with state IQ (based on NAEP) at .75. Ethnoracial demographics of the states were related to the…

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Test prepping discussion

From reddit http://www.reddit.com/r/Khan/comments/1znhcx/khan_academy_gets_rare_partnership_to_close/ Me: Test prepping does not work very well, so it’s a minor issue. SAT and ACT tests are mainly tests of g and one cannot train g. Him: That’s a common misconception, but they’re not general intelligence tests. SAT and ACT test very specific material that can be studied, so test prep…

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