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naraburns  nihil supernum  1yr ago (text post)   36180 thread views

Culture War Roundup for the week of October 24, 2022

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Ok, and?

….The problem you talk about in your Substack post is real, although not nearly as damaging with regards to the sort of HBD beliefs most salient in the culture war and pro/anti-HBD debate (i.e. not the issue of bullied gays) as one could assume from careless reading of your initial post.

I'm not claiming it to be damaging to HBD beliefs, I'm claiming it to be damaging to certain types of arguments and findings HBDers often make. There can be bad arguments for correct conclusions, and people who make those arguments should stop making them because it introduces noise and makes it harder to find the good arguments.

Again I posted various examples of people not properly applying the phenotypic null hypothesis. Let's zoom into one of them to understand the problem:

https://twitter.com/tailcalled/status/1475441032292667394

If one doesn't understand the phenotypic null hypothesis, then this is an exciting study. Researchers have shown jealousy and restricted sociosexuality to be genetic! And to be biologically linked to each other! In the past I would have been really interested in these sorts of results, as tying into all sorts of evo psych theories.

However, when appreciating the phenotypic null hypothesis, it's a boring study. What are we even supposed to learn from it? Obviously these variables are going to be heritable and genetically correlated, but this doesn't really tell us much.

If you disagree with this notion, then feel encouraged to make your case for why this is such an important and meaningful finding.

Turkheimer, like Lewontin before him with his «apportionment» and, more to the point, with his corn plants (cited by Ned Block here), is making a mountain out of a common-sensical molehill, in his case to bury the monster of HBD implications that have sprang forth (as he asserts, unreasonably) from his own First Law that he now seeks to reframe (as much is stated in the paper).

I don't think Turkheimer is being an obscurantist here. He's a leading behavior geneticist and an editor for a behavior genetics journal; he has to deal with an endless stream of papers that proudly talk about how they've shown this and that to be genetic. He's got excellent reasons to try to make people accept the phenotypic null hypothesis, since it's a huge piece of missing knowledge.

Measurement error is a fundamental problem; though as better-informed people remind us, there are methods, e.g. common pathway models, which help against it,

But these models are rarely used. Even from the "better-informed people", I have had trouble getting it for e.g. testing the causal effect of g.

It is also possible to directly test for AE vs ACE

This is badly powered when C is smallish, e.g. try computing the power requirement for C^2=0.01.

(Besides, we have plenty of data such as admixture and, as of late, GWAS confirming simple additive model for the group difference – qualitatively similar to the case of height, not similar to gay-bullying and personality research)

I don't see how GWAS additivity defends personality research, can you expand? In particular I don't see how phenotypic null hypothesis predicts nonadditivity.

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