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Intelligence predicts cooperativeness better than conscientiousness does - Marginal REVOLUTION
Intelligence has a large and positive long-run effect on cooperative behavior. The effect is strong when at the equilibrium of the repeated game there is a trade-off between short-run gains and long-run losses. Conscientiousness and Agreeableness have a natural, significant but transitory effect on cooperation rates

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Note that agreeable people do cooperate more at first, but they don’t have the strategic ability and consistency of the higher IQ individuals in these games. Conscientiousness has multiple features, one of which is caution, and that deters cooperation, since the cautious are afraid of being taken advantage of. So, at least in these settings, high IQ really is the better predictor of cooperativeness, especially over longer-term horizons.

I think Garett Jones commented on this on Twitter or in a podcast?
econotariat  marginal-rev  commentary  study  economics  behavioral-gen  psychology  cog-psych  microfoundations  hive-mind  cooperate-defect  iq  psychometrics  personality  discipline  long-short-run  patience  time-preference  equilibrium 
27 days ago by nhaliday
Measuring fitness heritability: Life history traits versus morphological traits in humans - Gavrus‐Ion - 2017 - American Journal of Physical Anthropology - Wiley Online Library
Traditional interpretation of Fisher's Fundamental Theorem of Natural Selection is that life history traits (LHT), which are closely related with fitness, show lower heritabilities, whereas morphological traits (MT) are less related with fitness and they are expected to show higher heritabilities.

...

LHT heritabilities ranged from 2.3 to 34% for the whole sample, with men showing higher heritabilities (4–45%) than women (0‐23.7%). Overall, MT presented higher heritability values than most of LHT, ranging from 0 to 40.5% in craniofacial indices, and from 13.8 to 32.4% in craniofacial angles. LHT showed considerable additive genetic variance values, similar to MT, but also high environmental variance values, and most of them presenting a higher evolutionary potential than MT.
study  biodet  behavioral-gen  population-genetics  hmm  contrarianism  levers  inference  variance-components  fertility  life-history  demographics  embodied  prediction  contradiction  empirical  sib-study 
27 days ago by nhaliday
Comparing within- and between-family polygenic score prediction | bioRxiv
https://twitter.com/StuartJRitchie/status/1116074740475736066
https://archive.is/bQnjM
See this thread for our new study on polygenic scores within fraternal twin pairs! Main point: take extra care with polygenic scores for traits like IQ & education, because they're confounded by (what seem to be) socioeconomic status effects. Not so for traits like height & BMI.
The idea is that the parenting is caused by the parental genotype, so it gets (mis)classified as a genetic effect on the children. It's really another way of looking at "genetic nurture" - see the papers from last year.
study  bio  preprint  biodet  behavioral-gen  genetics  sib-study  GWAS  class  s-factor  iq  education  attention  disease  psychiatry  embodied  health  environmental-effects  parenting  regularizer  spearhead  multi  twitter  social  commentary  backup 
9 weeks ago by nhaliday
Sci-Hub | The genetics of human fertility. Current Opinion in Psychology, 27, 41–45 | 10.1016/j.copsyc.2018.07.011
very short

Overall, there is a suggestion of two different reproductive strategies proving to be successful in modern Western societies: (1) a strategy associated with socially conservative values, including a high commitment to the bearing of children within marriage; and(2) a strategy associated with antisocial behavior, early sexual experimentation, a variety of sexual partners, low educational attainment, low commitment to marriage, haphazard pregnancies, and indifference to politics. This notion of distinct lifestyles characterized in common by relatively high fertility deserves further empirical and theoretical study.
pdf  piracy  study  fertility  biodet  behavioral-gen  genetics  genetic-correlation  iq  education  class  right-wing  politics  ideology  long-short-run  time-preference  strategy  planning  correlation  life-history  dysgenics  rot  personality  psychology  gender  gender-diff  fisher  giants  old-anglo  tradition  religion  psychiatry  disease  autism  👽  stress  variance-components  equilibrium  class-warfare 
march 2019 by nhaliday
Links 3/19: Linkguini | Slate Star Codex
How did the descendants of the Mayan Indians end up in the Eastern Orthodox Church?

Does Parental Quality Matter? Study using three sources of parental variation that are mostly immune to genetic confounding find that “the strong parent-child correlation in education is largely causal”. For example, “the parent-child correlation in education is stronger with the parent that spends more time with the child”.

Before and after pictures of tech leaders like Jeff Bezos, Elon Musk, and Sergey Brin suggest they’re taking supplemental testosterone. And though it may help them keep looking young, Palladium points out that there might be other effects from having some of our most powerful businessmen on a hormone that increases risk-taking and ambition. They ask whether the new availability of testosterone supplements is prolonging Silicon Valley businessmen’s “brash entrepreneur” phase well past the point where they would normally become mature respectable elders. But it also hints at an almost opposite take: average testosterone levels have been falling for decades, so at this point these businessmen would be the only “normal” (by 1950s standards) men out there, and everyone else would be unprecedently risk-averse and boring. Paging Peter Thiel and everyone else who takes about how things “just worked better” in Eisenhower’s day.

China’s SesameCredit social monitoring system, widely portrayed as dystopian, has an 80% approval rate in China (vs. 19% neutral and 1% disapproval). The researchers admit that although all data is confidential and they are not affiliated with the Chinese government, their participants might not believe that confidently enough to answer honestly.

I know how much you guys love attacking EAs for “pathological altruism” or whatever terms you’re using nowadays, so here’s an article where rationalist community member John Beshir describes his experience getting malaria on purpose to help researchers test a vaccine.

Some evidence against the theory that missing fathers cause earlier menarche.

John Nerst of EverythingStudies’ political compass.
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march 2019 by nhaliday
Harnessing Evolution - with Bret Weinstein | Virtual Futures Salon - YouTube
- ways to get out of Malthusian conditions: expansion to new frontiers, new technology, redistribution/theft
- some discussion of existential risk
- wants to change humanity's "purpose" to one that would be safe in the long run; important thing is it has to be ESS (maybe he wants a singleton?)
- not too impressed by transhumanism (wouldn't identify with a brain emulation)
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april 2018 by nhaliday
Frontiers | Can We Validate the Results of Twin Studies? A Census-Based Study on the Heritability of Educational Achievement | Genetics
As for most phenotypes, the amount of variance in educational achievement explained by SNPs is lower than the amount of additive genetic variance estimated in twin studies. Twin-based estimates may however be biased because of self-selection and differences in cognitive ability between twins and the rest of the population. Here we compare twin registry based estimates with a census-based heritability estimate, sampling from the same Dutch birth cohort population and using the same standardized measure for educational achievement. Including important covariates (i.e., sex, migration status, school denomination, SES, and group size), we analyzed 893,127 scores from primary school children from the years 2008–2014. For genetic inference, we used pedigree information to construct an additive genetic relationship matrix. Corrected for the covariates, this resulted in an estimate of 85%, which is even higher than based on twin studies using the same cohort and same measure. We therefore conclude that the genetic variance not tagged by SNPs is not an artifact of the twin method itself.
study  biodet  behavioral-gen  iq  psychometrics  psychology  cog-psych  twin-study  methodology  variance-components  state-of-art  🌞  developmental  age-generation  missing-heritability  biases  measurement  sampling-bias  sib-study 
december 2017 by nhaliday
Genome-wide association analysis identifies 30 new susceptibility loci for schizophrenia | Nature Genetics
We conducted a genome-wide association study (GWAS) with replication in 36,180 Chinese individuals and performed further transancestry meta-analyses with data from the Psychiatry Genomics Consortium (PGC2). Approximately 95% of the genome-wide significant (GWS) index alleles (or their proxies) from the PGC2 study were overrepresented in Chinese schizophrenia cases, including ∼50% that achieved nominal significance and ∼75% that continued to be GWS in the transancestry analysis. The Chinese-only analysis identified seven GWS loci; three of these also were GWS in the transancestry analyses, which identified 109 GWS loci, thus yielding a total of 113 GWS loci (30 novel) in at least one of these analyses. We observed improvements in the fine-mapping resolution at many susceptibility loci. Our results provide several lines of evidence supporting candidate genes at many loci and highlight some pathways for further research. Together, our findings provide novel insight into the genetic architecture and biological etiology of schizophrenia.
study  biodet  behavioral-gen  psychiatry  disease  GWAS  china  asia  race  generalization  genetics  replication 
november 2017 by nhaliday
The weirdest people in the world?
Abstract: Behavioral scientists routinely publish broad claims about human psychology and behavior in the world’s top journals based on samples drawn entirely from Western, Educated, Industrialized, Rich, and Democratic (WEIRD) societies. Researchers – often implicitly – assume that either there is little variation across human populations, or that these “standard subjects” are as representative of the species as any other population. Are these assumptions justified? Here, our review of the comparative database from across the behavioral sciences suggests both that there is substantial variability in experimental results across populations and that WEIRD subjects are particularly unusual compared with the rest of the species – frequent outliers. The domains reviewed include visual perception, fairness, cooperation, spatial reasoning, categorization and inferential induction, moral reasoning, reasoning styles, self-concepts and related motivations, and the heritability of IQ. The findings suggest that members of WEIRD societies, including young children, are among the least representative populations one could find for generalizing about humans. Many of these findings involve domains that are associated with fundamental aspects of psychology, motivation, and behavior – hence, there are no obvious a priori grounds for claiming that a particular behavioral phenomenon is universal based on sampling from a single subpopulation. Overall, these empirical patterns suggests that we need to be less cavalier in addressing questions of human nature on the basis of data drawn from this particularly thin, and rather unusual, slice of humanity. We close by proposing ways to structurally re-organize the behavioral sciences to best tackle these challenges.
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november 2017 by nhaliday

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