Crémieux Profile picture
Dec 20, 2024 17 tweets 6 min read Read on X
Psychotic people follow scripts.

Let's talk about the glass delusion, the Middle Ages' bout with a mass psychogenic illness marked by people believing they were made of glass. Image
Glass was a valuable commodity in Europe. It was primarily owned by the noble and well-to-do, and it had a notable purpose in alchemy.

Its perception as the technology of the time was as one that's both fragile and valuable, like the nobility. Image
Glass was the relatively novel technology people knew, and they knew things could be transmuted into glass. Delusional people also thought transmutation could affect them.

Take King Charles VI.

He truly believed his body was made of glass. Image
This delusion was such that Charles felt he had to build his life around it.

He had iron rods fastened into his clothing to hold him up, and he didn't allow his advisors to approach him, lest they accidentally shatter him.

This illness set in during his twenties. Image
The age when his psychotic bouts started is remarkably consistent with when the illness starts today.

Were he alive today, he probably would have been prescribed antipsychotics for his condition. Image
But Charles was alive long before his condition was understood.

He also wasn't its only sufferer. As alchemy's popularity grew, more people started to suffer the glass delusion.

They understood glass as fragile, and themselves as fragile, and they acted out that script. Image
For the well-off, the delusion was treated as legitimate. Many nobles came to wear padded buttocks.

But in one case, in Saint Germain, a doctor took a man who thought his butt was made of glass and beat him until he stopped believing in the delusion.

Apparently that worked. Image
Amusingly, in Rene Descartes' Meditations on First Philosophy, he remarked on the glass delusion and used it as an example of how people can see the world in totally different ways.

Of course, he did say that the perception was insane.Image
Fast forward to the 19th century and factories are beginning to dot the landscape of Europe.

With the change in popular technology, people's delusions followed suit.

With industry, the delusions became industrial. People imagined they were being influenced by vast machines. Image
Patients who presented with this belief in intricate, far off machines that controlled their actions and influenced their lives could never explain how they worked.

Just as people didn't know how they became glass, they didn't get how machines were affecting them. Image
Factories influenced the world, machines could obviously influence us, thus...

Schizophrenics' delusions are tailored to what they vaguely know, and they learn about those half-baked delusions from others, the times, etc.

Consider exorcism. Its modern script came from a movie! Image
People today know about parasites, chronic pain, post-viral conditions, toxic poisoning, and more, and they have an amazing tool for finding and promoting related scripts:

The internet! Image
Thousands of people today believe they have a skin condition called Morgellons.

It's not real.

They just believe they're developing sores and lesions, and hairs are sprouting from them, but they're really picking themselves raw and getting freaked out by cotton fibers. Image
The sufferers from this condition are deeply unwell, and they spread their unwellness to other people through posting about their condition online.

People know about all the requisite concepts, and they see something on themselves and imagine it's a real symptom.

But it's not.
There are no demons, there's no Morgellons, people cannot be made of glass, and there's no big machine out there influencing people and miraculously disappearing the moment those concepts go out of fashion and get replaced by other ones with nary a cure invented.
And this keeps happening!

People are always inventing new conditions or imagining they're afflicted by something real when they're not, by reading into symptoms and gaslighting themselves.

And they sometimes act incredibly mad in these bouts of belief. Image
A subset of people today seem vulnerable to scripts, and some seem to have always been vulnerable to it.

It makes you wonder: must psychotic people always be like this? And what can we do to cure them of their delusions?

I suggest we don't give in with padded buttocks.

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More from @cremieuxrecueil

Jan 17
Greater Male Variability rarely makes for an adequate explanation of sex differences in performance.

One exception may be the number of papers published by academics.

If you remove the top 7.5% of men, there's no longer a gap! Image
The disciplines covered here were ones with relatively equal sex ratios: Education, Nursing & Caring Science, Psychology, Public Health, Sociology, and Social Work.

Because these are stats on professors, this means that if there's greater male variability, it's mostly right-tail
Despite this, the very highest-performing women actually outperformed the very highest-performing men on average, albeit slightly.

The percentiles in this image are for the combined group, so these findings coexist for composition reasons. Image
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Jan 17
One of the issues with understanding Greater Male Variability on IQ tests is that groups that perform better tend to show greater variance

Therefore, to estimate the 'correct' male-female gap, you need to estimate it when the difference is 0

In the CogAT, that looks like this: Image
In Project Talent, that looks like this: Image
And comparing siblings in the NLSY '79, that looks like this: Image
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Jan 14
About a decade ago, a theory emerged:

If men do more of the housework and child care, fertility rates will rise!

Men have been doing increasingly large shares of the housework and child care.

Fertility is lower than ever.Image
In fact, they're doing more in each generation, but fertility has continued to fall. Image
The original claim, that men's household work would buoy fertility, was based on cross-sectional data that was inappropriately given a causal interpretation.

The updated cross-sectional data is as useful, and it affords no assurances about the original idea.

We should move on.
Read 4 tweets
Jan 13
American military veterans have a suicide problem.

Some have theorized the reason is deployment-related trauma.

Leveraging the random assignment of new soldiers to units with different deployment cycles, Bruhn et al. found that was wrong.

Deployment did not increase suicides. Image
Looking only at violent deployments (ones with peer casualties), there aren't noncombat mortality effects either.

What explains veteran suicide rates? Image
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This may seem surprising, but it's not!

Their suicide rates are elevated over the general population because most of them are young White men. That group has a suicide issue. Image
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Jan 12
That aspect is probably not that unrealistic, unfortunately.

Across the OECD, on average, just 55% of 15-to-16-year-olds got this question right, and no country saw 80% get it.

Most people globally *do* struggle even reading simple tables. What else?

Thread.🧵 Image
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This is a simpler Level 1 question, but with this, 92% of the OECD got it, including just 65% of Brazilians and 53% of Peruvians. Image
Level 2!

Just 77% of the OECD got this, with less than half of the Mexican population being up to the task.

In fact, only Asian countries got over 90% on this trivial question. Image
Read 9 tweets
Jan 10
Credit card rewards are a great way to redistribute billions of dollars from people who are bad with money to people who are good with it.

With the advent of rewards cards (red), there's lots of cross-subsidization of people with high credit scores by people with low scores. Image
Curiously, the degree of cross-subsidization is not just an income thing.

People with high incomes (green) and moderate incomes (yellow) take fewer rewards at low credit scores, although they take more at high credit scores. Image
What does this do demographically? Spatially?

Credit card rewards transfer money from uneducated to educated, poor to rich, Black to White, and rural to urban. Image
Read 5 tweets

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