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Buy my books here:
"At Our Wits' End: Why We’re Becoming Less Intelligence and What It Means for the Future":
https://www.amazon.co.uk/At-Our-Wits-End-Intelligent/dp/184540985X/ref=sr_1_1?ie=UTF8&qid=1549614585&sr=8-1&keywords=at+our+wits+end
"How to Judge People By What They Like"
https://www.amazon.co.uk/Judge-People-What-They-Look/dp/1977067972/ref=pd_bxgy_14_img_2/262-2853591-5467111?_encoding=UTF8&pd_rd_i=1977067972&pd_rd_r=b239b9b9-2b7b-11e9-8855-e763fa1967f0&pd_rd_w=i6A5P&pd_rd_wg=1sIq1&pf_rd_p=a0365e62-3353-40ad-91cf-d4ca762b18a7&pf_rd_r=EBEW11F7KA2Y3WGBM6PB&psc=1&refRID=EBEW11F7KA2Y3WGBM6PB
Race Differences in Ethnocentrism
Pre-order: info@arktos.com
Churchill’s Headmaster: The Sadist Who Nearly Saved the British Empire
Pre-order: info@manticore.press
J. Philippe Rushton: A Life History Perspective
https://www.amazon.co.uk/J-Philippe-Rushton-History-Perspective/dp/1983273708/ref=sr_1_1?ie=UTF8&qid=1550857424&sr=8-1&keywords=j.+philippe+rushton
Sinistrality is associated with (slightly) lower general intelligence: a data synthesis and consideration of secular trend data in handedness
The relationship between the general factor of intelligence (g) and handedness is investigated using a combined sample of 23511 respondents from three large databases: the NLSY’79 (US), NLSY’97 (US) and NCDS (UK). Dextrals – those who use their right hands were found to be 1.22 IQ points higher than sinistrals (left handers) after controling for sex and age and correcting for sources of measurement error. To see if the association between IQ and handedness was strongest on the abilities that were the best measures of g, the method of correlated vectors was used to test for moderation. Across the three studies, g was found to very weakly negatively moderate the association between ability measure and handedness (ρ=-.023, K=3, N=23511), however in the NLSY’79, the coding speed subtest was an outlier in terms of the strength of its association with handedness. Its removal yielded indications of positive moderation in this dataset, which when aggregated boosted the overall vector correlation value to .539 (K=3, N=23511), suggesting that g might be an important moderator of this relationship. Secondary analysis of secular trend data on the changing percentage of sinistrals in Western populations indicates that overall, sinistrality has increased, entailing a g decline of .106 points over 150 years (.006 points per decade). The secular increase in sinistrality is consistent with other data indicating long-term declines in developmental stability and may stem from some combination of increasing mutation load and advancing maternal age in Western populations.
Why do high IQ societies differ in intellectual achievement? The role of schizophrenia and left-handedness in per capita scientific publications and Nobel prizes
Previous research has attempted to understand why countries with relatively favourable conditions and high estimated average IQs (such as Finland and Japan) have a relatively low per capita number of scientific Nobel prizes. In the present study, we examine whether there is a relationship between national schizophrenia and left-handedness prevalence, on the one hand, and per capita scientific and literary achievement, on the other hand, in countries with IQ estimates of at least 90. We find that per capita science and literature Nobel prizes and scientific publications are strongly negatively associated with schizophrenia and strongly positively correlated with left-handedness. There also was a very pronounced negative correlation between schizophrenia rate and left-handedness rate. These results suggest that genius can be regarded as a combination of very high IQ, aspects of high functioning autism (specifically low altruism) plus relatively low impulse control, consistent with observations of intellectually outstanding individuals, and the fact that schizophrenia appears to constitute the opposite pole of these aspects of autism spectrum. We posit differences in testosterone levels as a possible underlying explanation for these findings.
