Meng Hu

Jensen & Kirkegaard have a new study showing that the Black-White IQ gap did not reduce over time, as evidenced by the lack of effect in the cohort variable. The Blacks have a mean of 85 IQ.

Some people argued that 2.5 IQ difference between males and females is so small that it doesn't matter. It depends on the context. When you combine this gap with the larger male variance, it matters in workplace. The person who best illustrated this is La Griffe du Lion.

openpsych.net/files/papers/P… They report that such findings are consistent with the idea that brain size is a causal factor of differences in intelligence.

Parra & Kirkegaard just published a meta-analysis showing a sex IQ gap of 2.57 IQ in favor of men, among adults. Richard Lynn's hypothesis was also validated, with large male advantage with age.

davidepiffer.com/p/a-debate-on-… "If we demanded that every member of group A carry one allele and every member of group B another before allowing taxonomic recognition, many named subspecies would evaporate overnight."

The argument goes: if biological races existed, we'd find variants present in all of one group and none of another. Yet the Marsican brown bear is considered a distinct subspecies—without a single universally fixed diagnostic mutation. The double standard only applies to humans.

Crémieux's post: cremieux.xyz/p/are-girls-sm… Paper: journals.uchicago.edu/doi/full/10.10…

A new study claimed that women are more intelligent than men. Their conclusion holds only because they changed the rules of the game, i.e., by redefining what's called intelligence. As Crémieux noted:

davidepiffer.com/p/did-brain-si… "Across individuals in the AADR sample (≤ 45,000 BP), the polygenic scores for brain volume and cortical surface area are strongly positively correlated (r ≈ 0.59)."

Piffer argues that the decline in brain size after the Upper Paleolithic disappears once temporal and geographic lumping (and the sampling biases it induces) are accounted for.

People with higher IQ scores showed greater intermodular connectedness in specific frontal and parietal brain regions. The ability of brain networks to adapt their connections efficiently to allow for fast switches between cognitive tasks seems to explain high IQ scores.

@LizzyStarrrdust @ubiquitousnewt in this case that's even worse. Because that would mean women would choose their best friends as confident and as closest person over their husband.

@MengHu13 @ubiquitousnewt This doesn't mean that romantic relationships matter more to men than to women It just means that women have more friends.

Romantic relationship matters more to men than to women. "49% of men claimed that their romantic partner was their primary confidant, whereas only 20% of women did ... 80% of men, but only approximately 50% of women, viewed their partner as their closest person".

publica.org.au/wp-content/upl… "not only anticipate more positive outcomes from being in a romantic relationship than women do; they also experience more positive outcomes once in a romantic relationship, which translates into better health outcomes than remaining single."

source: davidepiffer.com/p/genetic-evid…

Marsican brown bears diverged into a distinct human‑tolerant subspecies in 3k years. Genomics suggest drift + possible selection on behavior under human pressure. This means that rapid behavioral divergence between isolated human populations is biologically plausible.

@stanfordNYC Recently I discovered that the number of views in my posts declined drastically, down to a few hundreds. Content hasn't changed, but my motivation has changed. I thought for a moment I was shadow banned. Apparently not, but I'm not even sure.

@MengHu13 This is probably the first post of yours that I was shown in maybe three months fyi

This study shows that overall psychological functioning peaks in midlife. This closely aligns with the typical peak in career achievement. source: https://www.sciencedirect .com/science/article/pii/S0160289625000649