On the Political Correctness of “g”

I’m a scientist now. Specifically, a scientist at a neuroscience company. But not a neuroscientist.  I know, confusing, but the point is that I’ll probably be writing mostly about neuroscience at this blog now.

One project I’ve been working on involves intelligence. For decades, there has been a war between the idea that intelligence is one thing—i.e., there is a “g” factor that powers all intellectual feats—and the idea that intelligence is many things—i.e., there are several independent factors that power different intellectual feats.

I have no idea which is true. The data behind the debate is complicated, and I have a feeling it won’t be unambiguously interpreted until we have a better understanding of the physical workings of the brain. But one thing that I find fascinating is that the “g” idea is seen as the politically incorrect position.

Why? I suppose it’s because it simplifies people’s intellectual ability to a single number, which makes people uncomfortable. If your g factor is low, everything you can possibly do with your mind is held back. Which, scientifically speaking, sucks.

What I don’t understand is why adding more factors is more politically correct. Let’s say there are two independent factors underlying intelligence: g1 and g2. If you’re below average on g1, well, there’s still a 50% chance that you’re below average on g2 as well, which means your mind is still behind on every possible intellectual feat. But hey, any given person still has that 50% chance of not being bad at everything. Is that the difference between acceptable and offensive? A coin flip’s worth of hope?

It’s like the old argument for common ground (kinda) between atheists and religious folks: “I contend we are both atheists, I just believe in one fewer god than you do.” Similarly, little-g enthusiasts just believe in one (or more) fewer intelligence factors than their politically correct colleagues. They have even more common ground, because they agree that there is at least one measurable variation in intelligence. Is there really such a big difference between the positions? Can’t we all just get along?

I’m content to reserve judgement and follow the data in any direction, regardless of which direction is popular and deemed inoffensive for arbitrary reasons.


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