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Solomon Kurz

@solomonkurz.bsky.social

Clinical psychology researcher | applied statistics geek | so called #RStats influencer

7,238 Followers  |  696 Following  |  1,387 Posts  |  Joined: 26.07.2023  |  2.538

Latest posts by solomonkurz.bsky.social on Bluesky

also true

06.10.2025 19:57 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

@matthewbjane.bsky.social, thoughts on any of this?

06.10.2025 18:49 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I think we agree.

One *can* interpret sigma from y ~ group + some_covariate, but such a sigma is no longer the population pooled SD in the conventional sense, and is therefore not a great choice for a standardizer of a standardized mean difference (at least not in the typical sense).

06.10.2025 18:46 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Not quite: bsky.app/profile/solo...

06.10.2025 18:39 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

In other words, sigma from y ~ group + some_covariate is no longer an estimator of the population pooled SD. It's just a statistical artifact at that point.

06.10.2025 18:36 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1

language is very difficult with character limits...

06.10.2025 18:35 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Thanks. I see what you mean, and should clarify that whereas I recognize that point, sigma from y ~ group is also an estimator of the population pooled SD. When I used the language of residual SD in the open post, I meant from covariates in addition to group.

06.10.2025 18:34 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 0

Say more about 1. I don't follow. To my mind, it's counter to the logic behind Cohen's d.

06.10.2025 18:27 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

In Ch 19 (nyu-cdsc.github.io/learningr/as...) of his 2nd edition, Kruschke used *residual* SD as a standardizer for group differences from a multilevel ANCOVA. Is there any precedent for using a *residual* SD as a standardizer for a standardized mean difference effect size? #RStats

06.10.2025 16:06 โ€” ๐Ÿ‘ 13    ๐Ÿ” 5    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
Causal inference interest group, supported by the Centre for Longitudinal Studies

Seminar series
20th October 2025, 3pm BST (UTC+1)

"Making rigorous causal inference more mainstream"
Julia Rohrer, Leipzig University

Sign up to attend at tinyurl.com/CIIG-JuliaRohrer

Causal inference interest group, supported by the Centre for Longitudinal Studies Seminar series 20th October 2025, 3pm BST (UTC+1) "Making rigorous causal inference more mainstream" Julia Rohrer, Leipzig University Sign up to attend at tinyurl.com/CIIG-JuliaRohrer

Happy to announce that I'll give a talk on how we can make rigorous causal inference more mainstream ๐Ÿ“ˆ

You can sign up for the Zoom link here: tinyurl.com/CIIG-JuliaRo...

06.10.2025 11:43 โ€” ๐Ÿ‘ 131    ๐Ÿ” 48    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 4
LnuOpen | Meta-Psychology

My article "Data is not available upon request" was published in Meta-Psychology. Very happy to see this out!
open.lnu.se/index.php/me...

04.10.2025 12:54 โ€” ๐Ÿ‘ 96    ๐Ÿ” 34    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 8

If you've ever wanted to learn how to make beautiful websites with #QuartoPub and #rstats , check out this workshop I'm giving in a couple weeks! It'll be a blast (and we're covering Quarto's brand new _brand dot yaml system!)

03.10.2025 18:36 โ€” ๐Ÿ‘ 84    ๐Ÿ” 26    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1

F

03.10.2025 23:37 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

"alcohol use" alone is not a disorder

03.10.2025 22:00 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

25%

03.10.2025 21:59 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

How often do you see open code for dissertations at the UW?

03.10.2025 00:45 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

well put

02.10.2025 20:56 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

disagree

02.10.2025 20:31 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I prefer my doughnuts made with skill

02.10.2025 20:28 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

I would like to throw that plot down my garbage disposal

02.10.2025 20:24 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

This is the only correct answer

02.10.2025 20:14 โ€” ๐Ÿ‘ 6    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

of all the reasons I got into science, trust wasn't among them

02.10.2025 19:35 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

except the deaths of their suicidal clients

02.10.2025 19:33 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Despite heroic efforts by a small cadre of people in the field, the vast majority of senior PIs in clinical psychology continue to be uninterested or hostile to OS practices.

It makes me think they just don't care, and it's really depressing.

02.10.2025 13:42 โ€” ๐Ÿ‘ 39    ๐Ÿ” 8    ๐Ÿ’ฌ 5    ๐Ÿ“Œ 2

100%

p-value go brrrrrr

02.10.2025 18:41 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

This seems like an idiographic grouping, but I appreciate the specificity

02.10.2025 02:37 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Haven't seen it in years, but my family and I watched a bunch when I was a kid. Endorse

02.10.2025 02:36 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

๐Ÿ˜ฌ

02.10.2025 02:30 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

same

01.10.2025 18:44 โ€” ๐Ÿ‘ 3    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

True that. Sometimes the community really comes out.

01.10.2025 18:41 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

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