Here’s what I wrote about my initial impressions in another thread:
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Well it seems obvious that different populations with vast genetic disimilarities may evolve the same trait. Bats have wings, butterflies have wings. They are not closely related. I am an hour into the podcast right now, and the podcast is focusing on race and IQ.
The claims Murray is making are;
- iQ is valid
- blacks score a full standard deviation below whites, and Asians 3 points higher
- They have normed these scores against so many criteria that they really can’t be argued
- to account for these differences in a way that is environmental rather than genetic you need to show that blacks on average suffer from a 1.5 standard deviation disadvantage versus whites on average in America in terms of environment (which includes nutrition, which is important because it is often not included in environmental criteria in similar studies)
- Groups don’t define individuals
- Intelligence doesn’t equal value
- A bunch of stuff about bell curves that is true pertaining to variance within groups being greater than variance between individuals within groups
- He has been unfairly prosecuted for presenting simple fact.
My reactions:
A. The math between #2and #4 do not actually add up. This is such a basic and fundamental blunder that I would guess there is a subtlety here that did not get explained in the podcast such as that it takes a 1.5x times difference in environment to equate to a 1x difference in standard deviation of intelligence, but is somewhere covered in the book. This however is a big blunder and a big explanatory gap and you just can’t throw it out there as if it isn’t, and ignore it in a discussion. A careful person making a careful argument should know to address it.
B. #4 is presented as if it is a huge number that could not possibly be real, and therefore trying to explain this difference away environmentally is a similar improbably large stretchstretch. However, when I look at it and translate it, what this actually comes out to is this: to explain the measure difference in IQ between blacks and whites in America as measured by Murray (I make no warranty on the validity of his statistics) one would need to say that the environmental disadvantage suffered by blacks is 21%. Or in other words, the average black kid is raised in an environment which is 21% worse than the average white kid.
Again, I make no warranty as to the quality of the statistics being put out by Murray, I am simply accepting them at face value as if they are true so that I am looking at Murray’s arguments in their own terms. My gut reaction is that I do not see 21% as being the stretch that Murray seems to think it is. In fact, if I were just to take a WAG at the systemic environmental inequality between blacks and whites in America based on socioeconomic factors I would say 20% and feel that I was being especially conservative (I, always conservative in WAGs,) I would guess the real number is higher. This seems like he is refuting his argument in his own terms. Feel free to place whatever number you want in here to decide if you think Murray is making a good argument.
C. In his insistence that he was norming properly he raised several factors as evidence to suggest that he did so comprehensively. He did not norm against several issues that I mentioned in a previous post, which are quite obvious, imo, and has also failed to mention several others that I did not mention simply because they were complex and not easy to describe in a sentence or two but that any idiot who spends any time fucking around with statistics should be aware of.
D. My expectation and prejudice going into this podcast was that the reaction against it was going to be a histrionic moral panic over something that is actually not controversial, and is rather mild.
This expectation and prejudice appears to be incorrect.
E. Sam Harriss does not appear to know enough about this subject to be aware of what is going on, and should probably stick to philosophy. This is the most charitable possible interpretation that I could extend him.”
I may need to change some of this. I did a little research trying to see what the current state of thought was concerning the differences in IQ (if any) between the races. I couldn’t find much that was current (or didn’t know where to look.). This might be because IQ is supposed to measure how smart you are intrinsically. Looking for racial differences in IQ may be an area of research that produces career suicide.
But lots of people are interested in racial differences in SAT scores. This is supposed to measure how ready you are for college. Nobody is saying it says how intrinsically smart you are.
So here’s a link from the journal of black education on the subject:
Here’s an opinion piece from the Washington Post:
These talk about a gap in SAT scores roughly equivalent to the same gap in IQ scores described in the podcast.
This presents an interesting problem: let’s say you have two tests. One test supposedly measure how much gas a gas tank can hold (analagous to IQ.). Another test measures how much gas is actually in a given tank (SAT.)
Now imagine if every time you run this test, both tests always give you the same answer. It doesn’t matter If some tanks have just been filled up and if some are in cars that have been driven a while since being filled. You still get the same answer for both tests.
This suggests you have a problem with one of the tests, and it’s not measuring what you want it to.
(Yes. I’ve oversimplified the analogy. Please don’t point this out. I’m just giving the gist of the problem.)