This post covers some stuff already covered by others, but more briefly. Two studies of interest: Riemann, R., Angleitner, A., & Strelau, J. (1997). Genetic and Environmental Influences on Personality: A Study of Twins Reared Together Using the Self- and Peer Report NEO-FFI Scales. Journal of Personality, 65(3), 449–475. Connelly, B. S., & Ones, […]

Back in January, Steve Hsu did an interview with Daphne Martschenko who is a phd candidate at Cambridge in education. She’s basically doing science journalism on behavioral genetics as far as I can tell. Now there’s a new interview up. I have some comments to it because Steve was a little too nice. Bias from […]

I am watching Brian Boutwell’s (Twitter, RG) talk at a recent conference and this got me thinking. What are we measuring? As far as I know, there are typically two outcome variables used in criminological studies: Official records convictions. Self-reported criminal or anti-social behavior. But exactly what trait are we trying to measure? It seems […]

In the comments on this SlateStarCodex post, someone is questioning my claim that sharing the chorion (what is that?) is unimportant: Emil: Uterine environment stuff is not important. We know this because of this study and because ordinary siblings are about as similar as DZ twins who did share the uterus at the same […]

Link: Embryo selection an add-on to IVF [his summary]: harvest x eggs fertilize them and create x embryos culture the embryos to either cleavage (2-4 days) or blastocyst (5-6 days) stage; of them, y will still be alive & not grossly abnormal freeze the embryos optional: embryo selection using quality and PGS unfreeze & […]

Download:   This is a GREAT book, which goes down to the basics about heritability and the various claims people have made against it. Highly recommended. Best book of the 29 i have read this year.   The denial of genetically based psychological differences is the kind of sophisti- cated error normally accessible only […]

This book turned out to be not what i had expected, but still interesting. Not sure why it got all the bad press. It’s behavior realistic but focuses on the environment which is what the author finds interesting. I think genetics is more interesting, but this is interesting too. The Nurture Assumption Why Children Turn […]