We can learn from tragedies - even preventable ones. It's important to remember though about hindsight bias, and the "nirvana fallacy." Let's talk about this a little bit.

Minithread time:

/1
Hindsight bias is forgetting the position we were at in the beginning of a decision; we have knowledge that came over time, but at the time we had less knowledge.

"You shouldn't have let your child the house," a police officer reprimands a parent after an accident occurs.

/2
Of course, the knowledge of the accident is where that advice comes from, not the knowledge prior to the accident. Parents let their children leave the house for a whole host of reasons, and sometimes parents THINK they are restricting it but the child leaves anyway.

/3
Today. what we know about COVID is now *prior* knowledge for a new wave/variant. Our advice about vaccination, restriction, non-medical interventions, is the *best knowledge we have now.* If we find out something new, it is NOT fair to use hindsight bias against "science."

/4
People make mistakes and misjudgments all the time. The true ERROR occurs when prior knowledge exists that was discarded, missed, or ignored. For example, the 90th time Gandhi or Makary says that "COVID is over" is wrong 90x, even if they eventually gets it right.

/5
The second bias/fallacy i see a lot is the "nirvana fallacy," where an ideal is espoused that is not tenable. It's very easily seen when someone suggests, in politics, that americans who oppose party x should vote for a third party candidate.

/6
A multiparty system would help the polarization of American politics, but pretending like voting for Jill Stein will beat Donald Trump is just not realistic. Change needs to occur, but not at the needless gesture of throwing away a vote (if one values stopping Trump).

/7
In COVID times, i see a lot of "impractical advocacy" that succumbs to the Nirvana fallacy.

"during lockdowns, we should be protecting our workers by providing wage protection and maybe NOT ordering from Uber."

/8
Of course, it's fine advocacy & it is helpful to remember that the marginalized and underprivileged bear the worst of the pandemic.

But, for example, in America, there was a political fight for months over $1200.

Sure, UBI might help during lockdown but ITS NOT HAPPENING.

/9
Ideally, those that have wouldn't need to shop and be served by those who need the work to survive. But practically, shutting down what we can and vaccinated and *minimizing* exposure risk to those who still work is at the very least tenable.

/10
Sorry, super-idealistic holier-than-thou tweeter, your strategy of a worldwide equitable prevention strategy with wage protections and income protection for every marginalized and homeless person is as useful as the college-age suggestion "we shouldn't have war, man."

/11
When thinking about covid, take a moment to ask yourself a few things:

1) am i succumbing to *hindsight* bias in my thinking (would i still feel the same way BEFORE i knew what i now know)

2) am i offering or thinking about anything realistic?

/12
If not, then maybe chill with the righteous anger.

Lots to criticize WITHOUT either bias or fallacy.

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More from @tylerblack32

23 Dec
/1 Thread: C'mon @nytimes, you can you please get suicide statistics right?!!

We really need to address the NYT's propensity for not understanding, & worse, poorly communicating suicide statistics. A new article.

Sigh. Here we go again.
/2 (overall, the article a compelling read!)

But In it, we have college campuses reporting suicides, however the #'s are 1, 2, 3... this is not actually abnormal.

Let's zoom in on one: Worcester Polytechnic with 2 (possibly 4 after investigation, according to the NYC).
/3 Worcester Polytechnic has concern because of a cluster of deaths, and I understand that, but we actually have CDC provisional data for Worcester County for 18-22 year-olds.

The 2019-2020 vs 2020-2021 suicide frequencies are NOT different. And they are lower than 2018-2019's.
Read 24 tweets
17 Dec
1/ California Kids: Suicides in COVID

The CA contrarians like the fearmongering & almost-always-wrong-in-two-months Monica Gandhi ghoulishly used child suicide #'s to advocate for reopening.

As shown, there was *no* unexpected increase of suicides during the yearlong lockdown. Image
2/ [/1]

When taken as a whole (red - March 2020-Feb 2021 vs blue - March 2019-Feb 2020), the overall increase was not significantly higher (95% CI -7.4% to +46%), though as the pandemic wore on things appear to increase than earlier.

Grey: 2013-2017

[/2]
3/ Rates in the 2nd half of the lockdown response in Sept-Feb 2020 are higher than 2019's rates (+2% to +169%, 63%), but it should be noted that this is not significantly higher than 2018, 2017, or 2016's rates.
[/3]
Read 8 tweets
16 Dec
THEAD:
What's really "Driving" the mental health crisis in kids?

Lets discuss the article by @hotzthoughts in @sciam, which unfortunately propagates mistakes.

I will say this loudly to the headline writer, however:

"COVID IS NOT DRIVING SOMETHING THAT WAS ALREADY THERE"

/1 Image
The CDC MMWR is quoted, showing an "increase in suicide attempts among people younger than 18." That report combines "non suicidal self injury" with "suicide attempts," which is a huge no-no. On top of this, I have addressed this report and its flaws



/2 Image
While it *IS* important that distress presentations to the ER increased (it is looking from embargoed data that it was jan-may spiking in girls), it is also crucial that this was NOT suicide attempts, or even, as the CDC authors wrongly stated "suspected serious attempts."

/3
Read 24 tweets
14 Dec
/1 Suicidology Update
"Kids during the Pandemic"

@CDCgov's full dataset, with every demographic.

TOP LINE:
Full lockdown phase: significant decrease (-15%)

SECOND HEADLINE:
Up but within expected for the remainder.

THIRD HEADLINE:
No change if the year taken in total.
/2 Note: GETH plot (my creation!). The previous months are actually TWO FULL pre-pandemic years (Mar-Feb 18-20), and all rates are standardized for population. Error bars are 95% CI for Proportions. All charts read MAR-FEB to capture a "full pandemic year."
/3 Can we break it down by sex? Sure can!

Boys: same pattern, suicides decreased significantly (-18%!) during the strictest school measures, and increased (nonsignificantly, 13%) during the second school year of the pandemic.

Take note of the FLAT March-July (more later)
Read 18 tweets
11 Dec
i have blocked, please report this account for targetted harrassment and threats against me.

"spam him!"
"you still have time (not much though), anyhow, your name's been officially added to the list"
"Hide. Hide now cos not much time left there for you all!"
more
more
Read 4 tweets
10 Dec
Statistics Canada has been asking kids about mental health during the pandemic. Initially, after the first 5 months (with school shutdowns, summer break, lots of restrictions), more kids said they were better than worse, most reported no change.

86% "No change or better"

[/1]
As the pandemic has pressed on, school started up again, wave after wave came, and kids continue to tell us when we ask them that things are getting worse for them.

[/2]
Our most recent survey (april), things have changed. When asked, kids are far less likely to tell us they are "the same or better" (-22%) and far more likely to tell us they are doing worse with their mental health: (+21%).

[/3]
Read 9 tweets

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