Crémieux Profile picture
Feb 10 6 tweets 2 min read Read on X
What happens when you make every kid in a school sit down for mindfulness training?

Seemingly nothing. Image
Maybe the effects materialize long after trials are through.

Using last-reported follow-ups rather than effects computed right after trials end, the evidence for any effect is actually weaker.

There might be fadeout if there's anything at all.Image
Mindfulness research is pretty curious.

Current measures of mindfulness are rubbish, complicating all of it:
We also live in a time when we know that effect sizes in educational research in general have plummeted as research quality has increased:
These interventions are hokey and their advocates are prone to overpromising given their weak fundamentals and reasonable priors on interventions effects. It's unclear whether there's any permutation of mindfulness interventions that would do all that they've been alleged to.

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More from @cremieuxrecueil

Feb 12
Boys play with trucks and girls play with dolls.

When researchers assess kids' toy preferences, that's the dichotomy they use. Really!

Across many articles, the most "boy-related" toys are thought to be vehicles and the most "girl-related" ones, dolls.

A🧵 Image
Sex differences in kids' toy preferences are huge. That's true whether you're looking at vehicles and dolls or every other type of toy. Image
When kids are allowed to just go about and choose their toys, there's a large difference. When they play freely, larger.

When they're presented with images of toys and they choose which to look at, there's still a sizable difference, but it's not as large due to the format. Image
Read 15 tweets
Feb 10
I've see many posts about the relationship between politics and intelligence in a single dimension: more to less conservative.

But if we split that into social and economic conservatism simultaneously, we see that more "Libertarian" views are smartest. Image
Social Conservatism is associated with lower intelligence, but Economic Conservatism (i.e., Liberalism) is associated with greater intelligence.

The least intelligent party would be something like the Stalinists, and the most intelligent something like the American Libertarians.
Read 4 tweets
Feb 6
Fertility is a dynamically evolving phenomenon.

Some of the facts about fertility have changed over time🧵

Consider the relationship with income. Across the OECD, we went from a negative national-level relationship to a generally positive one: Image
The correlation between income and fertility can be seen changing signs and magnitudes in a major way over time: Image
This relationship has reversed not only across nations, but also within them too. Consider Sweden, for example:
Read 17 tweets
Feb 4
SAT-only admissions would increase the representation of poor kids at elite institutions at the expense of less qualified legacy students.

During the (7th-10th century) Tang dynasty, the Keju examination made coming from a prominent family a less important part of elite success. Image
And elite marriage networks? Maybe even harmful later on. Image
Read 4 tweets
Jan 31
It's pretty clear that gay men beat a potential monkeypox crisis by getting vaccinated.

By not being vaccine hesitant, they caused a pandemic to peak and recede in under a year's time. Image
In this study, a single dose of the vaccine was estimated at 86% effectiveness, putting it on par with two doses of the polio vaccine (90% effective) for preventing paralytic polio. Image
Beating the next big disease is going to be as much about inculcating positive attitudes towards medicine in the public as it will be about developing preventative measures in the first place.

I'll wager public attitudes will even be more important for the foreseeable future.
Read 4 tweets
Jan 25
I'm not sure where he got this idea.

Tests from 2022 and 2023 supported

- An Asian mean IQ of 106
- A Hispanic mean IQ of 90
- A Black mean IQ of 84
Image
On the Air Traffic Selection and Training Exam, the measured Black IQ-equivalent score around 2013 was 87.96.


Image
On the GMAT in 2022, it was recently measured at 85.73.


Image
Read 7 tweets

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