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Behavioral Genetics

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The time has come for a review post on the laws of behavioral genetics. I will talk about why these laws are laws and why they are important. Eventually, this will be merged into my Behavioral Genetics Page, but for now, I will start with this primer. The five laws of behavioral genetics are: All... Read More
It seems few understand regression to the mean and how and why it works. Most people (and by most people, I mean most scholars – i.e., the people who should know better) have a vague understanding that it has something to do with IQ. They seem to have the impression it means that the children... Read More
Post updated, 7/23/15. See below! At long last, I reach my 200th blog post. It's been a quite a ride! Blogging on human biodiversity – or simply humanity – has taught me a great deal. Since the start, I hoped that I could offer some meager contribution to mankind with this blog. I will continue... Read More
In his latest VDARE column, John Derbyshire has written a glowing discussion of yours truly: John Derbyshire On JayMan—A Righteous Jamaican-American | VDARE.COM Well... more on that shortly. That is my thing. A couple of my tweets on the matter shoul
I have recently updated two key posts, my post More Behavioral Genetic Facts and More Maps of the American Nations. In More Behavioral Genetic Facts, I have expanded on an analysis on the meta-analysis of the heritability of criminality. This meta-analysis, a seminal work, represents the single best treatment of what we know of the... Read More
We were all waiting for it (I know I was). "Misdreavus" has chimed in on the hubbub surrounding Nicholas Wade's A Troublesome Inheritance. Here's what he has to
It's been nearly three years since the JayMan has been chugging away on the innerwebs about all this heritable biological impact on human behavior and society. I thought I would leave a quick snapshot of my most time-honored posts here at JayMan's blog. Now this is only for its life on Wordpress. For about the... Read More
Post updated, 9/14/14 6/5/14. See below! In my earlier post on Gregory Clark's work, The Son Becomes The Father, I laid bare the case for the known high heritability of human behavioral traits (including values and attitudes) and life outcomes. As well, equally important, I illustrated the complete absence of shared environment influences on these... Read More
I may have to make "misdreavus" a co-blogger here at some point, considering how I quote him here. But, in defending HBD (Human BioDiversity), he has made a nice basic summary of the reasons why we believe in HBD (that is, overwhelming evidence). This was all in response to social anthropology scholar A. J. West,... Read More
Across the United States, there is a general pattern – at least among Whites – of urban dwellers tending to be more liberal and rural dwellers tending to be more conservative. Indeed, this pattern is so pronounced that Steve Sailer managed to produce a now well-known (at least in the HBD-sphere) hypothesis of White American... Read More
Slate recently featured an article written by Roy F. Baumeister, Do You Really Have Free Will? In it, he claims that human do indeed have free will, something that regular readers will know that I have emphatically argued against. Baumeister doesn't make any supernatural appeals in this article; he does not appeal to some sort... Read More
EDIT, 5/30/15: [Post updated with results of new meta-analyses of behavioral genetic studies. See below!] Edit, 1/3/13: [Post updated to reflect additional information provided in the comments. See below and see the comments.] The time has come for a little reminder of the First Law of behavioral genetics. In my final post of 2012, I... Read More
Courtesy Razib Khan's Pinboard Feed: ScienceDaily (July 15, 2012) — Your genes determine much about you, but environment can have a strong influence on your genes even before birth, with consequences that can last a lifetime. In a study published online in Genome Research, researchers have for the first time shown that the environment experienced... Read More
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