April 30, 2017

IQ of Sub-Saharan Africa

April 15, 2016 RyanFaulk 1

In estimating the median IQ of Africa, I use 3 sources: Lynn’s IQ study data, international test scores, and Wicherts’ data. The advantage of the international test scores is that they are a well-funded body […]

IQs of Various Regions

April 15, 2016 RyanFaulk 2

To get a good grounding of IQ globally, we’re going to look at PISA and Lynn’s country IQ data, and look at various regions. And what we see is that PISA scores basically correspond with […]

Race and IQ: Mixed Populations Part 2

April 15, 2016 RyanFaulk 1

This article should be treated as a continuation of this article. In the previous article we looked at IQ studies of populations and samples of mixed-race people compared to monoracial subjects within a similar environment. Degrees […]

Race and IQ: Mixed Populations Part 1

April 15, 2016 RyanFaulk 8

One argument for heredetarianism is that, around the world, mixed-race populations have IQs, or other standardized test scores, that are intermediate between the two races they are a mixture of. Of course it’s messy, and […]

The Heritability of IQ

April 15, 2016 Francis 3

Introduction Monozygotic twins, who share 100% of their DNA, have IQs that correlate, on average at .76, meaning their IQs are far more similar than average, even when they were adopted away at birth and […]

Race and Stress

April 15, 2016 RyanFaulk 0

One of the non-genetic arguments used to explain racial IQ gaps is evnironmental stress. The idea being that blacks and hispanics are more stressed than whites, and this releases stress hormones, which depresses IQ scores. […]

Race compared to Family and Gender

April 15, 2016 RyanFaulk 4

Two ways to put the magnitude of race differences into perspective is to compare it to gender and family relations. This uses Fst distances which simply means proportion of variance between a population compared to […]

The Heritability of Brain Size

April 15, 2016 Francis 0

A review of 14 twin studies in which brain size was measured via MRI found that total brain volume was 82% heritable (Pepper et al 2007). In other words,  the vast majority of why some […]

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