tailcalled
1yr ago
A few days ago, I made a comment defending Turkheimer and critizing HBDers, in response to a vaulted "best of" comment dismissing Turkheimer. One of the main things my comment centered on was the phenotypic null hypothesis, which can roughly speaking be summarized as "correlation does not imply confounding" + "causation does not imply unmediated and unmoderated causation". Or as I phrased it:
Put simply, the phenotypic null hypothesis is this: Heritability tells you that if you go up through the chain of causation, then you will often end up with genes. However, there may be many ways that variables can be connected to each other, and there’s no particular reason to expect that every step along the chain of causation from genes to outcomes is best thought of as biological.
The consensus claimed that this was well-understood by HBDers around here, and perhaps even by HBDers more generally. Now I don't know that I buy that because it really doesn't seem well-understood in many places other than with people around Turkheimer.
In the thread, one person ended up posting an example of a paper which supposedly understood the nuances I was talking about. However, I disagree with that, and think that it is instead an excellent example of the problems with HBD epistemics. For instance, the paper opens by saying that the goal is to test evolutionary psychology hypotheses by testing for heritability in some personality traits:
According to the recent evolutionary-inspired theories (i.e., differential susceptibility [1], biological sensitivity to context [2]), humans, like many other species [3], differ substantially in their sensitivity to contextual factors, with some more susceptible to environmental influences than others. Importantly, these theories suggest that heightened sensitivity predicts both the reactivity to adverse contexts as well as the propensity to benefit from supportive features of positive environments. In other words, sensitivity is proposed to influence the impact of environmental influences in a “for better and for worse” manner [4]. These prominent theories converge on the proposition that genetic factors play a significant role in individual differences in Environmental Sensitivity (ES) [1, 2, 5].
Now, if you don't appreciate the phenotypic null hypothesis, then this would probably seem like a reasonable or even excellent idea. Evolution is about how genes are selected based on the traits they produce; if something is genetically coded, then evolution must have produced it, and conversely if evolution has produced it then it must be genetic.
But if you appreciate the phenotypic null hypothesis, then this study is of minimal relevance, almost no evidentiary value, and perhaps even eye-rollingly stupid. Of course the scales you administer are going to be heritable, because pretty much everything is heritable. Heritability doesn't mean that you've got anything meaningfully biological.
Now the thing is, my impression is that behavior geneticists do this sort of nonsense all the time, and that HBDers take them seriously when they do it. If HBDers instead properly appreciated the phenotypic null hypothesis, they would look somewhere else for this sort of info, or maybe even fix behavior genetics by propagating the info backwards to HBD-sympathetic behavior geneticists that they should read more Turkheimer. Notably, since this study was suggested as exemplary by someone here on TheMotte, it seems to provide at least an existence proof of someone who does not have a proper understanding of the phenotypic null hypothesis.
tailcalled
1yr ago
Well so here are two models:
-
People start with meritocracy as a value and then try to figure out the factual questions about how abilities work.
-
People start with some policy opinions or alliances or something and then work to rationalize those.
Model 1 is debunked because if people were trying to figure out the factual questions, they would take basic concepts like the phenotypic null hypothesis into account, and they would be upset about having signal-boosted terrible studies like the IQ/effort one. It's possible that there is some alternative to model 2 that people follow, in which case you should feel encouraged to share what that alternative is.
tailcalled
1yr ago
That's a rather lazy strawman. Whenever this comes up here, people say that their primary motivation is to show that the progressive argument "outcome disparities, therefore discrimination, therefore reverse discrimination is necessary" does not hold and leads to unfair treatment. You can very much come at it from an egalitarian point of view.
I'm basing my experience more on the Twitter debates that hover around Erik Turkheimer than I am on the discussions that happen on The Motte, as I don't have much experience with The Motte. It's quite possible that The Motte is different.
You lost me here. Could you elaborate for the innumerate?
I think if you're innumerate you should just not rely on quantitative studies such as twin studies because they require numeracy to interpret.
tailcalled
1yr ago
Particularly relevant to HBD, my understanding is that you might say that blacks scoring lower on tests might be shown to be heritable, but perhaps that could be because of racism. Since blackness is also genetically heritable, if blackness were to cause them to experience racism which causes their test scores to be lower, then this would be a plausible explanation for why low test scores appear to be genetically heritable in blacks, but it would actually be due to blackness being genetically inherited and that causing low test scores through a more indirect means than low intelligence.
Yes, that would be one potential example (though I don't expect this to be the true answer because it has been studied by e.g. looking for whether skin color is a mediator, though I'm currently trying to commission a different study which looks at it from a different angle).
However the phenotypic null hypothesis of course applies to tons and tons of behavior genetics, not just within race stuff but also lots of other places. And HBDers often discuss other behavior genetic studies without properly appreciating the phenotypic null hypothesis.
I think people are perhaps responding to you defensively because this feels like an isolated demand for rigor or weakmanning directed specifically at HBD, without considering the epistemic failings of hardline blank-slatists which are surely even greater.
I mean I've definitely called out people on both sides for nonsense. I even tend to hang out in Turkheimer's mentions and critique him. So I don't think I'm doing isolated demands for rigor, I think I'm doing widespread demands for rigor.
Also I think that showing a trait to be heritable has to count as weak Bayesian evidence at least in favor of a genetic explanation.
The prior probability that a variable is heritable is really really high. Meanwhile, Bayesian updating depends on the probability of the evidence being low, as otherwise it doesn't change your priors much.
tailcalled
1yr ago
Don't most girls not participate in such programs? You can only really expect to have an effect on the ones who participate, so if most don't participate, you are closer to not having the program at all than you are to having it for all the girls.
tailcalled
1yr ago
What about purging people like Turkheimer, who explicitly put their ideology above science? Are you giving them a pass, and instead prefer to focus on those who inappropriately address your methodological pet concern?
Look, to me, you seem to be more interested in purging people and silencing the discussion, instead of in using science to learn about reality and have these learning inform our behavior and policy.
I am interested in promoting people who can help me learn things and purging people who introduce noise and waste time.
It just so happens that there are a number of very general principles that must be taken into account, as they affect the results everywhere you go. HBD is one of them! For instance, racial differences in intelligence cause a whole bunch of racial inequality in outcomes, and if you don't realize that, there's going to be a comprehensive mysterious pattern, which might make you falsely infer something like "everything is racist". However, the phenotypic null hypothesis is another one! Phenotypic causality causes a whole bunch of heritability and genetic correlations, and if you don't realize that, there's going to be a comprehensive mysterious pattern, which might make you falsely infer some sort of genetic solipsism (especially in combination with measurement error, which suppresses environmental correlations).
If someone keeps spamming racial inequality studies and talking about structural racism, while being difficult to convince to even think of alternate hypotheses, then a healthy behavior genetics group should consider purging them and finding someone more productive to talk to. But if someone keeps spamming twin studies and talking about genetics, while being difficult to convince to even think of alternate hypotheses, then a healthy behavior genetics group should again purge them.
Why? Partly to avoid noise and waste, but also partly to align incentives to actually learning things, and so on.
You can’t even provide any example why your pet concern is relevant for me at all!
You're not interested in behavior genetics, you admit so yourself! Of course a key principle of behavior genetics is not going to be interesting to you.
tailcalled
1yr ago
Yes, but that probably says something about female interest in STEM, which is probably somewhat correlated with aptitude. You could of course argue that this, too, is caused by an all-pervasive patriarchy, but given that the presence of such programs in a society has a negative correlation with female interest in STEM (i.e. the so-called "gender equality paradox"), I find that harder and harder to believe.
AFAIK just about all sex difference correlate with gender equality, including obviously-societal ones such as gender differences in names:
https://twitter.com/DegenRolf/status/1432940616653152259
(And of course it's been shown to apply to e.g. gender stereotypes too, though that could very well be due to stereotype accuracy.)
I don't know why they correlate like this, but I feel like this gives you something equivalent to the phenotypic null hypothesis for the gender equality paradox: if the paradox applies to some variable X, and X is causally upstream of some variable Y, then a priori you'd expect the paradox in X to create a paradox in Y.
There are more people with an interest in, and a knack for, STEM to be found within the male than within the female population. Given that environmental interventions have rather spectactularly failed to reverse course in this regard, Occam's razor would suggest that biology plays a factor here.
The thing is, as kids, boys will look at what men do and mimic that, whereas girls will look at what women do and mimic that. I don't know whether it is the sex difference in programming etc. that is biological, or if it is the sex difference in mimicry that is biological. I wouldn't expect it to be both, because what would that lead to if you took all the world's female programmers and male elementary school teachers and had them create a society where they raised a generation of ordinary children? Would the boys in this society do programming (and thus be mimicking women), or mimic men (and thus do teaching)?
Since I don't know the answer to this question, I can't tell if the sex difference in programming is innate or not.
tailcalled
1yr ago
I agree that it must be all the way on or all the way off, and I would prefer if [it was all the way on and people cared about figuring out the truth].
tailcalled
1yr ago
This is mostly it, with one major point:
What about "genetically correlated"? We know tall people are better at basketball - the variables are correlated - but is this effect genetic, or environmental? Did tall people inherit their basketball skill directly, or was it just an effect of their height? If you get leg-extension surgery, do you get better at basketball?
If the basketball skill is an effect of height, then height and basketball skill will be genetically correlated. (For basically the same reason that if basketball skill is an effect of height, then basketball skill and height will be ordinarily correlated.) Not "will be misestimated to be genetically correlated when they are actually environmentally correlated" - but instead "will genuinely be genetically correlated". This is because genetic correlation is not a measure of whether height is horizontally pleiotropic with good slam-dunk technique, but instead just a measure of whether height genes and basketball genes are overlapping, for whatever reason it might be.
First -- your writing style doesn't work well for me. It's too abstract, and you don't clearly state your point. For example, your point #1 "Heritability simply does not mean what a lot of HBDers want it to mean - because of the phenotypic null hypothesis." What is your point here? What do you think "HBDs want it to mean"? What is the "phenotypic null hypothesis"? It's not good writing to make me chase down you thoughts, especially on other sites, especially before you've proven you're worth the work. I went to that site, and am not much more enlightened. You seem to somewhere make the point "Things influenced by genes often go though non-biological channels". Or maybe "things that look inherited aren't always". Sure, I'd say both are fairly non-controversial. A classic example of the second is, e.g. "speaking French" which looks inherited on the surface, but is clearly not biological. And yes, our environment and society mediate all kinds of things, we live in a complex interconnected world.
Do you have more of a point? I couldn't really tell (of course, that can be on me, but ... I've read and understood a fair number of others on this topic, but not your writing...) I really don't know what your code and diagrams at the end are supposed to show. Summarize your cool conclusion! E.g. "Even though X is not directly responsible, in a naive analysis it looks like it is, exactly like QQQ, which actually is directly responsible. Here's how that can play out ...". I think you're saying something like that, but you don't bother actually saying it (or I missed it).
Here are some examples of places where I'd bring it up on twitter:
The post comes from frustration with these sorts of situations. Importantly, it's not the specific interactions but instead that they are repeated and that often not much update happens. This seems like a point that should get signal-boosted more in a healthy community.
In any case you sort of seem to be saying "we can't figure anything out" which both seems wrong, and kind of useless. Do you apply this to all such studies? Maybe we should -- I admit, I tend to write off almost of all psychological and sociological studies these days, because they seem so ideologically captured. On the other hand, between statistics, twin studies (and separated twin studies), and sibling studies, we seem to be able to do a pretty good job on some things.
Yes, frequently scroll through my twitter and just fire of random quick tweets that debunk random social science studies. And I don't trust any social science studies until I've checked the methodology myself.
Second -- you seem to be coming at this from a place of significant bias. "Rightist inclined people want to preserve racial inequality of outcomes," is an incredibly weak straw-man, it's basically "Everyone I disagree with is a racist". Is that really the best you can do, in terms of extending charity to the people you disagree with? I personally, like most of the others here, see the acknowledgement of group differences (and for what it's worth, I don't really care much if it's culture or biology, and both seem taboo anyway) as primarily an alternative for differing outcomes, without discrimination being the ONLY explanation.
I'm in tech. There aren't many women, nor many black people. This is ascribed to sexism and racism, which doesn't match what I've seen, experienced, or heard from the affected people (from women at least; I haven't asked many black colleagues about racism). I see my company following policy to massively privilege both groups, and to blame white cis-men for all the problems, and those both seem wrong, and even damaging to me (and to a number of people in the targeted groups, e.g. women who just want to be SWEs, and not feel they got their role because of their sex, and no, I'm not concern trolling, the suspicion around the privileging is real). I see differing interests (and maybe ability at the margins) and degrees as the main reasons for the differing representation, but we're not allowed to notice that, as "It's not the pipeline". James Damore got fired for trying to make this point.
You also see this censorship of blasphemy in the US, especially around crime, where apparently pointing out some choice statistics around violent crime is considered a hate crime. (Again, FWIW, I'd consider those stats more a cultural issue, but it's a pretty important one, upstream of the 'getting shot by police' issue).
So anyway, what I'd like from you, and I think would benefit you, is to tighten up your writing -- make your point first, then provide an explanation of it (it's a classic academic / systemic thinker error to do it the other way around). Make things more concrete. Work from a specific example and tie your points back to it. People are reluctant to trust generic models, as they are often used to lie (see Abigail Thompson's dissection of Hong-Page's "mathematical proof that diversity trumps ability". There's a nice discussion of it here
Also, try to be more charitable to your outgroup.
You're making assumptions about my ingroups/outgroups that aren't necessarily true. E.g. I've spent tons of money on HBD-aligned research, partly for motivations similar to what you describe here.
No, this doesn't "obviously massively contradict" my common sense, and I think many would disagree. In fact, I thought one of the main points of IQ tests, rather than "effort tests", is that neither effort nor prep makes much of a difference to them. Otherwise, for example, they wouldn't stay very stable over time (which I understand they do).
I was under the impression that the test-retest reliability of IQ tests is 0.85? If we assume that the test-retest reliability of effort is 50% (I suspect it's higher, but let's be generous to your side), and we go by the estimate that 8% of variance in IQ is down to effort, then that would mean that effort would introduce an unreliability of 50%*8%=4% to IQ tests. This is considerably less than the 15% unreliability that I've commonly seen, so I don't see how your argument is even halfway close to working out here.
Prep courses would also have more value, which I don't think do. Do you think when people can't make intellectual leaps others do, they just aren't trying hard enough in that particular moment?
Isn't the item level of IQ tests (which seems like the closest analogy to intellectual leaps to me) dominated by noise? So I'd say noise, not g or effort.
Also even if we ignore the item noise point, by the numbers I'm giving, test effort would only be 8% of the explanation for test underperformance.
I think most would agree effort plays some role -- if I don't care or try at all on an IQ tests, and answer at random, I'll have a low score. If I try to be fast and disciplined, and use all my test-taking savvy, I'll probably (?) do better than if I just breeze through (although I wonder). But basically, once you're trying to do well, it's not really clear what "trying harder" even means on IQ test. It's not like pushing on a bar (and honestly, even for that the range where trying, vs training and genes and drugs, makes a difference, is pretty small in that moment. If I can barely do one pull-up, trying really hard might mean I do one, or two, but I'm generally not going to be able to do 10). So anyway, stop claiming consensus on things people will disagree on (especially things where your "consensus" seems to go against standard definitions).
It sounds to me that you are granting the basic point (effort plays some role), but then acting like you are disagreeing anyway? Is it a quantitative disagreement? If so, what is your estimate for the quantitative effect that effort plays?
tailcalled
1yr ago
As someone who believes that the racial IQ gaps are innate but who is wondering just how deep the rabbit hole of HBD incompetence goes, I would be interested in hearing more. What's the best case that it is due to environmental factors?
tailcalled
1yr ago
edit: I wonder to what degree growing up in a progressive family and school environment already approximates this.
edit: ! Can you test to which degree girls who grow up in prog environments go into programming vs trad? If this thesis is true, shouldn't it have some effect?
The theory is that children mimic same-sex adults, not that children do as same-sex adults tell them to. Doing what adults tell them to would be highly exploitable, so children often contradict instructions from adults.
Masculine/feminine work interests are fairly independent of progressivism/conservativism, so children would not be exposed to more gender-atypical work interests from their parents that way. However I've seen feminists provide a study showing that girls who had more masculine mothers grew up to be more masculine in lifestyle as adults.
But that study seems obviously genetically confounded. However you could adjust for the genetic confounding because the genetic effect should apply to both parents whereas the self-socialization effect should be sex-specific. I considered setting up a study for that once, but I got distracted.
tailcalled
1yr ago
Hm, that seems interesting but unfalsifiable. Even if parents try to pretend really hard that everyone is living in such a culture, can't you always say that the children are picking up on their deep-seated true social beliefs?
For just about any hypothesis, you can of course cook up versions that are unfalsifiable, but I don't think the basic version of the hypothesis is unfalsifiable. Of course direct interventions would be way expensive; but the child psychologists have various experiments they claim supports it that I don't think I've seen a strong HBD response to. (Not to say that I agree with the environmentalists here, I am currently agnostic I think.)
tailcalled
1yr ago
AFAIK the mainstream hypothesis among child developmental psychologists is a self-socialization theory, where children mimic adults in their culture. The whole patriarchy thing is more of a feminist activist thing that doesn't necessarily generalize to the expert's views. Of course the experts might be wrong too, but I'm just saying, as far as I know nobody has tried whether raising children in a culture where math and technical subjects is more of a women's thing works.
tailcalled
1yr ago
Regarding the gender gap in math ability, has any country tried to just make girls take twice as many math classes as boys do for a generation to see if that would reverse it?
tailcalled
1yr ago
Just for context, is there some specific intervention Erik Turkheimer has endorsed that you are objecting to/which you think has been shown to be ineffective?
tailcalled
1yr ago
Language and kind of also religion would be an exception, yes.
But beyond those exceptions, and a few others, it seems to me that there are an enormous number of traits where heritability shows up. Already at vocabulary and religiosity do you see a ton of heritability. Pretty much all personality traits and all interests are heritable. Of course the classic HBD point is that abilities tend to be heritable and highly genetically correlated. Relationship to parents, peers and teachers is heritable, I believe. Having a dog in your mid-life is heritable. Etc.
The point is that pretty much everything is heritable, so the prior for heritability is extremely high, not that absolutely everything is heritable.
tailcalled
1yr ago
One productive step you could take if you want people to engage with the argument is to do the work of simplifying the argument to the point where it doesn't take significant investment to understand it. Boil it down to a couple of sentences with a simple toy model, and explain how it analogizes back to the original claim. But your whole method of repeatedly posting to the front page "here's a link to a paper from a confessed liar, go do a ton of homework to understand it if you want to consider yourself rational" is just one iteration of a gish gallop.
What's wrong with the toy model I gave in my article, of education? That genes affect intelligence which affect exam completion which affect education?
tailcalled
1yr ago
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.
tailcalled
1yr ago
Sorry, didn't check your Twitter, as I'm not on it, and don't like it (and don't like following links just to know what someone's talking about; I do like them for references).
I think it would be best to read what people are saying before responding to them.
I guess if you stated clearly what you think contributes to IQ scores then perhaps we'd mostly agree. [...] What I read from your initial post is that effort was more important than everything else, which seemed clearly wrong. You gave this impression by not specifying how much effect you thought that it had, and by saying people claiming it didn't have an effect "obviously massively contradicts common sense," which is a very strong formulation.
Sorry, the point about how it "obviously massively contradicts common sense" was not meant to be interpreted as a measure of effect size, it was meant to be interpreted literally: as an expression that if I went out and told people that IQ tests don't depend on effort (as HBDers wpuld have me do), then people would conclude that I am delusionally worshipping IQ tests - and as I showed in the thread, it appears that they wpuld be right to conclude that.
That still seems quite a bit too high to me, and I don't really see how you clearly quantify 'effort'
🤷♀️ I just went with whatever quantification chosen by the leading IQ researcher whose study got signal-boosted. It's quite possible it's bad as I didn't look into it in detail, but if it is bad then I feel like that also reflects badly on HBDers for signal-boosting a study that uses a bad measure.
sorry, to me 8% really seems too high, I'd think how well I slept, the questions I got, my mood, time of day, my pencil, and a bunch of other things would play a larger role than nebulous 'effort'
Those might be correlated with effort. Mood in particular seems likely mediated by effort.
I don't really agree that effort is particularly nebulous of a concept. Have you never had the experience of just quickly marking down your first thoughts without wanting to bother thinking them through and not double-checking that they are right?
If that's not what you're implying, what is your point in bringing up effort?
My point in bringing up effort is that I was scrolling through my twitter timeline that is filled with social science, and then I saw all the HBDers I followed praising this guy for debunking the notion that IQ is affected by effort. And then I thought, hm, that sounds implausible, I should double-check the statistics, and it turned out the statistics were wrong and actually effort is affected by IQ.
I don't want to replace leftists lying to me about racial difference in g in order to rationalize racial equality with rightists lying to me about effort in IQ tests in order to rationalize racial inequality. I don't think I need special justification for wanting to know the truth about each question in a decoupled way from everything else. But if we absolutely should justify it by practical means, then a straightforward justification would be that this directly contradicts people's experience when filling out tests, and therefore looks delusional to insist on, presumably on the margin reducing the number of people sympathetic to HBD.
tailcalled
1yr ago
Yes, this is called environmental correlations, it is correct that the phenotypic null hypothesis also predicts the environmental correlation to be high whereas the genetic confounding hypothesis doesn't predict that. (Specifically, the phenotypic null hypothesis predicts every variance component to be correlated, whereas confounding hypotheses only predicts confounded variance components to be correlated.)
Some of the studies on homosexuality and mental illness finds the environmental correlation to be zero, which supports the genetic confounding view. I have at times acknowledged that/pointed that out. I also address the concept in my linked post.
The thing that bothers me is not the conclusion but instead the argument: WHY would HBDers make the argument with genetic correlations in the first place, when clearly it is the environmental correlations that are the key question? Because they don't know the phenotypic null hypothesis. But WHY would HBDers not know the phenotypic null hypothesis when it is such a basic concept for heritability? Because the phenotypic null hypothesis is anmoying and sounds like an outgroup thing, is my hypothesis.
tailcalled
1yr ago
Given how high stakes the LSATs and SATs are, who doesn't put maximal effort?
Neither I nor the person who did the study were making a claim about the SAT, we were considering a setting where people fill out surveys for pay on the internet.
Yet some people get way higher LSAT scores than others even though everyone is trying hard, suggesting innate differences still matter even if incentives also matter. Probably 100k+ people annually apply to top law & med schools, top colleges; I am sure most of them are putting in maximum effort on high-stakes tests such as the LSAT, GRE, ACT, SAT, MCAT, etc.
I didn't say effort was the determining factor, I said that it mattered, with natural variation in effort covering maybe slightly less than 10% of the variance (so if you go from slacking to max effort, maybe that gets you a bit more than a standard deviation of score).
Part of the problem with a lot of HBD-dunking, such as by Taleb, is they fail to control for individual preferences. So in aggregate, correlations between innate qualities and outcomes are low, but you are not accounting for individual preferences, not that genes do not matter.
Much of individual preferences are heritable too, but yes I agree that group-level differences are much less "noisy" than individual-level differences.
tailcalled
1yr ago
Blank slatism is a strawman though. E.g. Turkheimer had this denouncement to say of blank slatists who argue against heritability:
It is not a given that both sides of every argument are being reasonable. In the final analysis, this book is not reasoning forward from a known set of facts, seeking their explanation; it is confabulating backwards from a fixed conclusion, eliding any segments of the evidence that don’t lead to the preordained destination. The Trouble With Twin Studies is science denial.
tailcalled
1yr ago
Reliance on the "phenotypical null hypothesis" is uninteresting
Is the goal to be interesting or to figure out the truth?
and really I find the name to be ridiculous as it is just simply asserting an unearned null hypothesis status
It's not unearned, it's a fundamental property of heritability that it transfers through phenotypic causality, and there's lots of phenotypic causality to go through.
It's the same kind of critique that the possibility that we're actual brains in a vat means I can't be certain about measurements during woodworking.
No, the phenotypic null hypothesis agrees that the measurements work, it just points out something about what they mean.
But you understand that this doesn't actually impact policy discussion right? I don't need proof against solipsism to accurately measure a cut of wood and I don't need a unified theory of genetic determinism to find out that the policy proposals of blank slatists fail in every conceivable way and we should stop listening to their batshit theories.
I understand that the phenotypic null hypothesis is not a knockdown argument against HBD, and that it is not meant to be. Instead it covers the validity of various types of arguments.
Like if HBDers keep using argument that are invalid due to the phenotypic null hypothesis, and they refuse to learn about the phenotypic null hypothesis, then surely critics of HBD are in the right in dismissing HBDers as clueless about behavior genetics. You can't expect anti-HBDers to want to spend infinite time knocking down nonsense arguments. (Of course that point is symmetric - anti-HBDers also often come up with nonsense.)
Maybe there is some allergen with a simple intervention that will equalize all populations on average on IQ tests and achieve racial achievement equity and I'll celebrate that discovery more than you can image, but you don't get to call it a null hypothesis when literally no evidence has ever pointed to it being true.
The null hypothesis isn't about race differences in IQ, it's about within-population heritability in all sorts of things.
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.
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