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I just created an account on The Motte to PM someone a question, and afterwards I started browsing through some links and found this post in the vault: Belief Against an Intelligence Gap / Why the Woke Won't Argue: A look at Turkheimer and HBD research.
Now, a year ago or so, I would probably have strongly agreed with this post. But recently, I've come to a totally different conclusion: HBDers tend to totally refuse to engage with basic principles of the debate. I say that as an HBDer who has started interacting with other HBDers, and correcting when they make mistakes. Two core examples I have in mind:
Heritability simply does not mean what a lot of HBDers want it to mean - because of the phenotypic null hypothesis. You often see HBDers declare success when yet another twin study shows that yet another variable is highly heritable, or that there is a genetic correlation between two variables which are usually suggested to be causally linked to each other. In the latter case, I often see HBDers act as if the genetic correlation proves that there is genetic confounding between the two variables, which is a ridiculous suggestion if you think through the actual math. It's perfectly reasonable to say that the debate struggles with progressing because anti-HBDers aren't properly engaging with HBDers, but it would be a lie to also pretend that HBDers aren't also guilty of lack of thought and engagement.
HBDers often signal-boost nonserious or dishonest studies. My go-to example of this is this study on effort and IQ, which claimed to find that effort does not matter for IQ scores. This obviously massively contradicts common sense, and indeed when I took a quick look at the study, its data actually totally supported the notion that effort matters for IQ, and it's merely that the researcher (who is a well-respected leading IQ researcher!) analyzed it wrong (see my analysis in the thread, or perform the analysis for yourself). The researcher still has not changed his mind on the flaws of it, and I regularly see the study pop up on my timeline. If HBDers are going to boost these kinds of studies and ignore critique of them, then why should anyone listen to HBDers?
So, what view would I suggest? A far more symmetric view: Leftist inclined people want to create racial equality of outcomes, and they therefore boost whichever kinds of rationalizations they can come up with for the achievability and justification of such equality. Rightist inclined people want to preserve racial inequality of outcomes, and they therefore boost whichever kinds of rationalizations they can come up with for the unachievability of equality and justification of inequality. There's some honest people on either side who have been swept up in the drama, but in terms of the direction of the energy which drives the whole debate, this is what lies underneath it.
Hi again. You may not know it, but the author of the text in the vault, JB, is a bit of a meme here, an avatar of pig-headed intransigence and hubris, which lends credence to your words. Nevertheless, I can't see how your arguments justify disagreeing with him on this issue and indeed coming to a «totally different conclusion».
To begin with: because for most would-be listeners, supporting the opposite camp equals approval of one's family and one's people getting discriminated against (the nigh-inevitable alternative to HBD being acceptance of unredeemed racial guilt). Some are turned off by this; others are quite happy.
And because whatever the faults of HBDers, the other side remains epistemologically worse. Turkheimer may have some legitimate scientific argument against between-group genetic diffs on g; his bottom line was still arrived at through moralizing. «We can recognize a contention that Chinese people are genetically predisposed to be better table tennis players than Africans as silly, and the contention that they are smarter than Africans as ugly, because it is a matter of ethical principle that individual and cultural accomplishment is not tied to the genes in the same way as the appearance of our hair.»
HBD/Blank Slate is a political question more than it's a scientific one, a question of whether a civic religion founded on this stated promise of equal innate potential (or at least absence of substantial between-group differences) is needed for the prosperity of a polity and reduction in individual suffering; it's a question of oughts. Turkheimer et al. wear their oughts on their sleeves, adversarially, so it's a bit of a double standard to dunk on HBDers for failing or refusing to understand a peripheral aspect of «is».
Now to be clear, the faults of HBDers are not big. I have read a decent amount of your writing on the topic today, debate and adjacent content; the more I was reading, the stronger was the feeling that this'll be a fruitless debate. Your writing over the last year displays a trend towards isolated demands for rigor against HBD outlook (for unknown reasons that I assume, for now, are self-preservation and career strategy, a la Abdel The Backstabber, but might be just autistic perfectionism and purity spiraling; take your pick at which is less charitable). Your two examples aren't damning.
Your thread on effort and application of instrumental variables seems to sidestep the problem of scores influencing perception of effort, and anyway it doesn't affect the debate in absence of good evidence for differences in incentives&effort (and, well, whatever happens with low-stakes online IQ testing, people try «as hard as they can» in contexts relevant for long-term life outcomes or even on serious IQ tests).
Your triumphant post on the environmental null hypothesis is… inconclusive, since it doesn't bother comparing models following from theories on their predictive merits (and also other twins and pedigree schemes). You can't just «call» ENH like you so often do on Twitter, and certainly can't just assume that nobody accounts for measurement error, that all causal effects will generate genetic correlations, and thus that the usual HBDer touting of gen correlations/gen confounding is invalid. Take any actually published model emphasizing environment (i.e. an X factor creating race differences – I mean, okay, the gay-bullying-mental illness stuff at least proposes a half-legible causal pathway), and subject it to scrutiny next to a genetics-first one – most likely, it'll fall apart first.
Like Bryan Pesta's career did: it took years of digging by concerned people, but this HBDer got caught on a technicality and made unemployable. He had tenure, too. As for the non-tenured faculty, we can have Turkheimer spell it out. Like Bird says, there is reason to be optimistic about the eventual result of such policies:
So there's no money in it; databases are getting closed off too; getting published is near-impossible (note that all those would-be publications deal with weaknesses of HBD research program that you lament). The paradigm is shriveling up and dying (though Hyde would beg to differ). HBDers' incompetence is the intended outcome of censorship. In time, you'll have every self-respecting scientist firmly in the blank slate camp; forget structural equation modeling, unrepentant HBDers won't understand trivial correlation coefficients, and will be wholly undeserving of attention. Won't this make your argument so much stronger? And I think this means your argument is ultimately uninteresting, as far as science or policy are concerned.
You seem to use a coarse-grained notion of politics involved, in stark contrast to your (not necessarily correct but hard-to-critique*) analysis of the technical side. Most «HBDers» are the opposite: laymen beliefs both in the heritability of human behavioral traits and in between-group differences owing to genetics overwhelmingly come from raw life experience, not from data analysis and literature; approval of papers is driven by priors and the general vibe. Likewise comes the understanding of political implications; the sense of unfairness in this debate; and the will to signal-boost arguments-like-soldiers of your allies. This sounds low-IQ, and it is, but consilience can be pretty powerful, and HBD is anything if not consilient; so they're justified in not worrying a lot about minor nitpicks.
As for what happens on the other side – let's say that your model doesn't follow from your text and may conflict with the data. Emil sums it up nicely:
Call me a misanthrope, but it's a priori implausible for people en masse to have consistent abstract preferences such as «equality» and «inequality». Equality is an obvious compromise; beyond that, people just root for the team and want their side to be on top or at least not trampled upon. Bluntly, white «rightists» want to not be punished for the underperformance of Blacks, and thus prefer an HBD narrative that puts them solidly below some groups, above others, and absolves them of their purported sin of systemic racism. «Leftists» have other ideas, so they obstruct research into between-groups genetic differences and enforce the conclusion of racism being the leading causal explanation by fiat.
But this obstruction, when perpetrated by knowledgeable people such as Kaplan or Turkheimer or Rutherford, is telling enough, and cancels out all incompetence HBDers and even run-of-the-mill racists may show.
I think the honest way of addressing this is "fuck your anti-white racism", not coming up with elaborate justifications that were never epistemically serious to begin with.
This sounds like a scientific metapolitical question as much as it sounds like a political one. See the end of this book review for more discussion.
I don't think I have an isolated demand for rigor towards HBD. In other places than the linked ones I regularly challenge anti-HBD. The issue is that neither side wants to be rigorous aka both sides just want to make things up with studies that support their general vibe without checking whether those studies are actually of any evidentiary value.
If scores influence perception of effort, then it would lead to a downwards bias in the estimated effect, not an upwards bias. Also it is not really mathematically plausible that the direction of causality is reversed because that would require an effect size of around 2, whereas unless there are shenanigans going on they should only go up to 1.
And yes I agree that it would be ridiculous to say that the racial differences in IQ are due to differences in effort. The effect of effort is fairly small, so you would need a humongous difference in effort to cause it. The problem is that HBDers do not separate this question from the question of whether effort affects IQ scores, and so they say stupid things like that effort doesn't matter for IQ in order to protect the notion of race differences, when really the obvious answer should be "yes, effort matters but it doesn't explain race differences".
I don't believe that. I often didn't try as hard as I physically could on exams. For instance once I was done with exams I might leave earlier if allowed instead of checking over my answers for errors, where of course if I had checked over my answers I would inevitably have found some errors and thereby increased my scores. I also never really prepared for exams ahead of time.
First, it's phenotypic null hypothesis, not environmental null hypothesis, i.e. if someone is smarter due to having a bigger brain and this bigger brain makes them do better in exams and therefore get more education, then that would be weird to call "environmental"
Secondly, while I can't assume that nobody accounts for measurement error, I can assume that the overwhelming proportion of studies don't account for measurement error, because I've seen that they don't. For an example in the case of personality, see how this shows almost all twin studies on the heritability of personality to be wrong: https://emilkirkegaard.dk/en/2017/02/getting-personality-right/
And I can totally assume that causal effects between individual difference variables generate genetic correlations between them (as long as they are heritable, but remember, everything is heritable). I gave you the theory and a simulation for why; if you disagree then show me a hypothetical counterexample where there is a causal effect but no induced genetic correlation. This is where I really consider it a big, damning fault, because this is really basic stuff.
A failure to understand the phenotypic null hypothesis is the same tier of error as an environmentalist who assumes that any difference in outcomes must prove that there is racial discrimination. No! Racial differences in abilities also predict racial differences in outcomes. Similarly, nonbiologically mediated/moderated causation predicts heritability and genetic correlations too, not as any sort of bias or measurement error or anything, but simply from the definition of what heritability is. If you don't accept this then you are not seriously engaging in the debate and no better than the environmentalists.
Now it's perfectly reasonable to raise questions about genetic confounding. It's just idiotic/dishonest/??? to say that genetic correlations prove genetic confounding.
I am not bringing up the phenotypic null hypothesis as being a debunking of the HBD view on racial differences in intelligence. I agree that it doesn't debunk the HBD view on racial differences in intelligence.
I am bringing it up as a basic fact about heritability how heritability works that HBDers fail to understand/fail to engage with.
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