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You're making two different arguments here and kind of tying them together. First: you're claiming that there actually is some kind of universal "spatial reasoning" skill. Usually people who claim that also believe that this skill is somewhat generic - it applies to lots of different contexts and transfers easily from (say) visualizing rotations in space to finding your way around a 3d environment and so on. There's actually a fair bit of research that questions this supposition (take a look at embodied cognition to challenge the theoretical model, or stereotype threat effects to challenge the assessment model).

Secondly, in this context, the assumption is that not only does this generalized attribute exist in humanity and we can measure it, but this attribute causes success in $job. That's a further assumption that I'd call into question. Sure, plenty of people who do well on $test do well on $job, but those could easily be covariate or epiphenomenological relationships rather than causal ones.

I don't doubt that for some values of $test, there's some discriminatory power predicting the presence of success, especially in more monocultural environments (affluent, often-white, often-male, often-young startups, to caricature). But I do believe that this kind of test would suffer from strong false negatives as many kinds of people who would otherwise be excellent programmers (or whatever other $job) are rejected for not doing well on $test.

That's why I worry about anyone who puts real stock in these kinds of tests - it is (generally) indicative of a kind of science blind spot in the user. People are critical and skeptical of all kinds of other scientific claims, but psychological measures tend to get a pass.

I imagine the fact that a lot of us tend to score well on IQ tests has a lot to contribute here. When I found out how many standard deviations above the mean my IQ score represented, I was pretty excited about how awesome I was. When I realized that the test was probably baloney, I had to figure out more interesting ways to shore up my self-esteem. Personally: I bake bread and fish for compliments on the quality of my sourdough.




I prefer stronger evidence than "I don't doubt" when positing an international raciosexual conspiracy. Especially if that conspiracy would presumably have heinous and far-reaching consequences.

I learned, as an adult, that I had taken an IQ test while young and had scored in the 99.97th percentile. I think that I got that not everything benefits from what IQ tests measure. That said, I had already started seeing great success in a knowledge industry. It is clear that you also have great linguistic intelligence. I don't think you could completely dissociate your IQ test results from that intelligence.


I don't think you could call the general lack of diversity in tech a "raciosexual conspiracy". Rather, it seems a lot more like the result of classic pressures - institutionalized racism and sexism, combined with the general tendency of people to prefer other people who look like them.

The fact that certain groups of people tend to test well (or, taken conversely, that there are so many reasons why otherwise "intelligent" people don't test well) just exacerbates this problem and I think the central claim is still reasonable: things like IQ tests aren't necessarily strong predictors of tech skills, are dangerously close to pseudoscientific when misapplied, and have enough other theoretical problems that they should probably not be utilized during a hiring process.

As to my own linguistic skills, I contend that a lifetime of reading as well as a MS (in computer science), a Ph.D (in cognitive science and education), and ten years afterwards in academics including a professorship has prepared me as a writer. Did I have some initial Potential that gave me a head start? Maybe. If nothing else, I had the head start of my general introvertedness and a love of both reading and geekiness. A short test that purports to measure a fixed potential somehow inherent in someone is going to be pretty flawed.

But my "I don't doubt" phrase was more along the lines of ceding a central point: there probably do exist certain inherent characteristics that vary between people and provide some kind of predilection or head start. I'm just not yet convinced that the scientific community has really identified them yet, or that they're really able to effectively measure them yet. Instead, we get proxies that have a very high false negative rate, especially among otherwise-marginalized groups.

Anyway, four paragraphs is probably enough here.


Could there possibly be a chance that with your majestic IQ might make you a bit biased on the subject? Mind you, I have a uselessly high IQ, too, and I still think they're are an insult to hard working and bleedingly knowledgeable people who could outperform you and I, easily. I'm just not sure what the value of the tests are, considering the discriminatory ease.




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