Crémieux Profile picture
Aug 16 23 tweets 9 min read Read on X
One concept I wish more people were aware of is the Tocqueville Effect.

Named for Alexis de Tocqueville, this concept describes the curious phenomenon by which people become more frustrated as problems are resolved:

As life gets better, people think it's getting worse!🧵 Image
You go to a supermarket and it's time to get some fruit.

Of course, when you go to pick your bananas and your berries, you want to pick the freshest stuff.

But if what's on display is a little less fresh than ideal, you might consider a speckled banana or squishier grapes OK. Image
This is natural and fine.

You know what's not fine?

Cops beatinging jaywalkers because the crime rate dropped.

With too few "assaults", more mild crimes might start getting treated like assaults, even if they shouldn't. Image
Freshness and assault can both be examples of the Tocqueville effect, or as it's been called in the scientific literature: prevalence-induced concept change.

If you need a real-world example, consider the concept of "microaggressions": with less racism, people have to invent it.Image
Incredibly, we see this experimentally

In this first trial, participants were asked to rank a series of 1000 dots that varied from very blue to very purple on a continuum, with a stable prevalence of each color throughout

Results for the first and last 200 trials were identical Image
In this second trial, the researchers changed it up.

Now, the prevalence of blue dots would be decreased as the trial went on.

Notice what happened? People started seeing dots which they would've previously identified as purple as being blue instead. Image
This is, frankly, amazing.

If you just shift the prevalence of something, people start identifying marginal things as it more often—objectively, literally in terms of what they classify the things they see with their eyes!

And this holds up in a fairly broad way.
Researchers repeated this with different designs

In one, they prompted differently. In another, they asked people to stay consistent and paid for success. They changed the speed of color change, reversed the direction of the change...

Replicated each time!
But are we sure this applies to abstract concepts?

Yes!

In another trial, with photographs of people independently rated as more or less threatening displayed at stable prevalences, we get this: Image
When the experiment was redone with a decreasing prevalence of threatening faces, the result held up remarkably well from the previous color experiment.

That is to say, participants started rating the same faces as more threatening. Image
Rinse, repeat—Tocqueville evidently identified something very real a few hundred years ago.

And this works with even more complex concepts.

In this trial, participants played the role of reviewers on Institutional Review Boards, rating the ethicality of proposed studies.Image
Reduce the prevalence of study ethicality (rated by outside raters until they agreed) and...

Bam! Same thing as before!

People start rating ethically neutral proposals are being unethical! Image
When I explained this to a friend, I told them that the most interesting thing about this was that there were individual differences in how much the effect appeared.

Some people could see prevalence change a bunch and be unaffected. Others shifted strongly. Keep that in mind!
Now, I think you should be able to tell why I think this concept is so important and so neglected.

It is applicable to thinking about a huge number of issues.

Take lead abatement. Blood lead levels keep falling, race differences are almost gone, and funders care more than ever! Image
Or take literacy.

We're at historical highs for literacy rates, so why should we be throwing more and more money, effort, and urgency at the tiny residual of people who are illiterate?

Or consider police shootings. They're way down, but public interest is way up. Image
Think about billionaires.

They're increasingly likely to be self-made men, but as a society, we've become increasingly likely to be worried about their unearned privileges and whatnot, when the truth is, we've been moving away from that at a breakneck pace. Image
Human trafficking?

Slavery?

Racism?

These are all ills that have virtually vanished, but public outcry is pitched and tempers are flared, and even saying that we've basically beaten these issues (though problems remain!) is treated as denialism when it's just a fact!
So much makes sense in light of the Tocqueville Effect.

As problems get smaller, the attention given to them must grow.

This is a personal problem for many, too. Have you ever noticed that activists refuse to claim victory? Many get stuck crusading for life. Image
Imagine you're some HR bureaucrat tasked with fixing a problem at your company

If you manage it, you make the office a more hospitable place and you'll naturally start looking at smaller issues as evidence you're still needed, thanks to this effect—self-justification not needed!
Frankly, I think this is a source of a huge amount of modern pessimism.

Perhaps if people realized they were falling prey to this, that would help them to cheer up. Who knows?

I'll leave you with some words from Chris Rock: Image
P.P.S.

Lots of people have independently come up with the Tocqueville Effect in various forms.

Consider "Simon's Rule": Image
P.P.P.S.

Bodybuilder obsessing over that last little bit of fat on their sculpted stomach?

You guessed it: body dysmorphia as Tocqueville Effect! Image

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More from @cremieuxrecueil

Aug 14
This is a great way to visualize the effect of divorce on children's success as adults🧵

Children whose parents went through a divorce while they were aged 0-5 ranked about 2.4 percentile points lower in the income distribution when they were 25 years old. Image
The other effects—on teen birth rates, mortality, college attendance, and incarceration—are all relatively large while being absolutely small in effect.

In order, those are +73%, +35%, -40%, and -43%.

But here are those absolute effects:Image
This study's dataset is uniquely good relative to the rest of the literature.

It's built off of administrative data, and it's very large in scale. That allowed the authors (the lead of which I heartily endorse!) to do a lot of well-powered analyses and produce cool descriptives.
Read 14 tweets
Aug 12
Why do GLP-1 drugs like Ozempic seem to fix so many different outcomes?

I just read a clever study that might help us find the answer🧵

The method they used was good ole Mendelian Randomization! Image
Mendelian Randomization is a causal inference technique that uses genetic variants affecting some trait as instrumental variables (IVs).

To grok IVs, consider an example: how do you estimate the effect of smoking during pregnancy on birth weight?

One way is sibling comparison: Image
But we often don't have the large, family-linked datasets needed for sibling comparisons.

An alternative is to use cigarette taxes as an instrument.

This works because cigarette taxes impact the amounts people smoke, but they don't directly affect birth weights.

Instrumenting! Image
Read 13 tweets
Aug 11
This is real!

Generally people who say they were sexually assaulted with sedatives involved are incorrect about being sedated.

In the study referenced here, the prevalence of sedatives among cases was minimal (~2%). For comparison, antidepressants were detected 375% more often. Image
Other details from the study worth mentioning:

1. This matches up with estimates from elsewhere. Women who think they were drugged generally were not.

2. Rohypnol is not common in general, nor is it commonly involved. Image
Image
Cases of alleged drugging are usually just cases of girls getting really drunk and thinking that there must have been a drug involved.

But there's usually not a sedative involved, it's usually just alcohol, and in fact, stimulants are more common. Image
Read 4 tweets
Aug 9
What happens when you provide students with subsidized or free meals?

Lots of studies have been published on this topic, but somehow the field hasn't reached a consensus.

Why?

Maybe because there's clearly publication bias. When accounting for it, effects fall towards zero: Image
If you just look at all the effect sizes in the literature, you might start seeing the issue.

Notice the long tail of positive results? Image
That tail shows up pretty much regardless of the details.

Universal or means-tested program? Outcome type? Meal type? Causal inference methodology?

Irrelevant: there's still a positivity bias. Image
Read 8 tweets
Aug 7
The Trump administration has officially taken a stance against debanking.

That means that, soon enough, no more Americans will be deprived of being able to hold a bank account because of the opinions they hold.

Americans will be free to think independently again🧵 Image
The executive order begins with some background:

Americans, often at the behest of government officials, have been subject to the loss of access to financial services.

That often meant having no access to bank accounts, debit and credit cards, investment tools, and so on. Image
And then it gets to the meat:

We want to stop this, because it is anti-freedom.

Financial institutions should not be able to stop Americans from holding whatever views they want to. It's not their business, so they're being asked to stay out of it. Image
Read 15 tweets
Aug 7
Trump is about to sign a historic memorandum.

The memo is going to change how Republicans operate in a way that is almost unprecedented.

In a few short hours, Republicans will start embracing the power of DATA to undermine their political enemies.🧵 Image
What do I mean?

Let today's memo be an example.

Today, the Trump administration is going after universities that have feign compliance with the Supreme Court's ruling in SFFA v. Harvard.

By that I mean, they've continued practicing affirmative action like NYU and Columbia.Image
How?

Through a data collection mechanism called the Integrated Postecondary Education Data System, better known as IPEDS. Image
Read 14 tweets

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