Solomon Kurz
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solomonkurz.bsky.social
Solomon Kurz
@solomonkurz.bsky.social
7.3K followers 700 following 1.6K posts
Clinical psychology researcher | applied statistics geek | so called #RStats influencer
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Reposted by Solomon Kurz
nrennie.bsky.social
I saw this chart in the wild a few days ago and it's been on my mind because the longer I look at it, the more confused I become by it. 📊

I'm fairly sure it's AI generated for a few reasons...

A #DataViz thread 🧵
Bar chart of percentage of population aged 25-64 that can't speak a foreign language. UK is at the top. The chart design is confusing to say the least.
January 5, 2026 at 3:38 PM
Reposted by Solomon Kurz
danielroelfs.com
✨New blog post✨

I break down the beautiful data visualizations from a New America report (cowritten by @oscarp.bsky.social) and try to recreate them in R using ggplot2.

danielroelfs.com/posts/new-am...
Daniel Roelfs
Learning data viz from the best: New America and Datawrapper
danielroelfs.com
January 4, 2026 at 8:38 PM
solomonkurz.bsky.social
The 1.3.0 version of my {brms} + {tidyverse} translation of Kruschke's "Doing Bayesian data analysis" is up!

solomon.quarto.pub/dbda2

#rstats

1/8
Doing Bayesian Data Analysis in brms and the tidyverse
solomon.quarto.pub
January 2, 2026 at 5:00 PM
Reposted by Solomon Kurz
kph3k.bsky.social
Is one of your goals for 2026 to write more? One question I get all the time is, "How do you make time to write?" So, here is my unsolicited writing advice for the new year:
December 31, 2025 at 5:07 PM
Reposted by Solomon Kurz
freerangestats.info
I have put together an index page compiling my various #rstats blog posts using #Pacific island countries and territories; data: freerangestats.info/blog/pacific.... Topics such as choropleth maps of the Pacific, demographic techniques and trends, and multidimensional vulnerability.
Posts about the Pacific
I write about applications of data and analytical techniques like statistical modelling and simulation to real-world situations. I show how to access and use data, and provide examples of analytical p...
freerangestats.info
December 29, 2025 at 2:44 AM
Reposted by Solomon Kurz
naomicaselli.bsky.social
I am looking for a psychometrician to consult on a short term project. Any recommendations for someone who has done a lot with IRT and test development?
December 19, 2025 at 9:05 PM
Reposted by Solomon Kurz
dingdingpeng.the100.ci
You remember that Nature Aging paper about how multilingualism protects against accelerated aging? Well…
December 17, 2025 at 7:15 AM
Reposted by Solomon Kurz
sabrinanorwood.bsky.social
Did you know that from tomorrow, Qualtrics is offering synthetic panels (AI-generated participants)?

Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"
Text reads: About synthetic panels Recruiting the right participants for a study can be difficult. You may not get the exact demographics you need, and the shorter the deadline, the less sure you can be that everyone will answer on time. One possible solution can be to use synthetic panels. Synthetic panels are powered by a first party proprietary AI model developed here at Qualtrics. Our synthetic panel is trained on thousands of responses from a variety of demographic backgrounds in order to more accurately predict how certain populations would respond to a survey. Our synthetic panel is based on the United States General Population, and is only available in English. This panel comes with ready-made quotas and target breakouts in order to represent your chosen population and make it easy to launch your survey right away. Text reads: Question-writing best practices To get the most reliable and actionable results from synthetic audiences, consider these question-writing best practices: Ask forward-looking and attitudinal questions. Synthetic panels perform best with perceptions, preferences, and intent-based questions. For example, “How likely are you to try…?” Synthetic panels are less applicable for studies on past behaviors, detailed recall, brand recall, or awareness questions. For example, “When did you last visit…?” Text reads: Discussion The current study aimed to conduct a meta-analysis of the TPB when applied to health behaviours which addressed the limitations of previous reviews by including only prospective tests of behaviour, applying RE meta-analytic procedures, correcting correlations for sampling and measurement error, and hierarchically analysing the effect of behaviour type and sample and methodological moderators. Some 237 tests were identified which examined relations amongst model components. Overall the analysis indicated that the TPB could explain 19.3% of the variance in behaviour and 44.3% of the variance in intention across studies. This level of prediction of behaviour is slightly lower than that of previous meta-analytic reviews which have found between 27% (Armitage & Conner, 2001; Hagger et al., 2002) and 36% (Trafimow et al., 2002) of the variance in behaviour to be explained by intention and PBC.
December 16, 2025 at 5:38 PM
Reposted by Solomon Kurz
dingdingpeng.the100.ci
The "smartphones/social media" discourse suffers from some amazing historical amnesia. There was no 2008 financial crisis and no global pandemic starting in 2020, it's all SCREENS SCREENS SCREENS. Major world events? Just the backdrop against which SCREENS happened.
December 15, 2025 at 7:05 AM
Reposted by Solomon Kurz
ruben.the100.ci
Psychologists, what are your favorite (open) data sets for teaching multilevel modelling? I have a lot of observational examples, would love a therapy RCT with varying effects for therapists or some such.
December 15, 2025 at 10:27 AM
Reposted by Solomon Kurz
ianhussey.mmmdata.io
Critique argues post-publication peer review "often focuses on minor details" and "risks damaging trust in both the research itself and the peer review process" found to contain:

- Hallucinated references
- Undisclosed COIs (EiC is author)
- 8/9 authors have retractions or related scandals
An expert criticism on post-publication peer review platforms: the case of pubpeer - DARU Journal of Pharmaceutical Sciences
While traditional peer review offers advantages in academic publishing, it is often hampered by significant weaknesses, leading to frustration among many authors. Scientific discoveries after publicat...
link.springer.com
December 13, 2025 at 12:12 PM
solomonkurz.bsky.social
Another day, and another reference to these bangers. Contemporary causal inference has fundamentally changed the way I think about control variables and mediation analyses. These can show you why:

doi.org/10.1177/2515...
doi.org/10.1111/spc3...
doi.org/10.1177/2515...
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
doi.org
December 12, 2025 at 9:19 PM
Reposted by Solomon Kurz
phdemetri.bsky.social
Favourite books from Taylor Routledge? Already have @vincentab.bsky.social ‘s book in my basket
December 12, 2025 at 4:17 PM
Reposted by Solomon Kurz
ianhussey.mmmdata.io
Project Implicit gives you feedback when you complete an IAT, and the IAT literature has aspired to individual level measurement since its inception.

In this article, we quantify the individual level uncertainty around these estimates and show that IAT effects can say very little about individuals.
December 9, 2025 at 12:11 PM
Reposted by Solomon Kurz
jamiecummins.bsky.social
Just published in Behavior Research Methods:

The individual-level precision of implicit measures

w/ @ianhussey.mmmdata.io

🧵👇

link.springer.com/article/10.3...
The individual-level precision of implicit measures - Behavior Research Methods
Implicit measures are used extensively in psychological science. One fundamental goal of these measures is to provide information diagnostic of an individual’s attitudes or beliefs. After 25 years of ...
link.springer.com
December 9, 2025 at 11:20 AM
Reposted by Solomon Kurz
tomhollenstein.bsky.social
So...my undergrad thesis student is doing a quality analysis of studies found in meta-analyses. She identified a few and we contacted the authors to request their effect sizes and other variables for the studies in their papers.

Here's what happened:

scientiapsychiatrica.com/index.php/Sc...
The Impact of Social Media on Adolescent Mental Health: A Meta-Analysis | Scientia Psychiatrica
Introduction: The proliferation of social media has raised significant concerns about its potential effects on the mental health of adolescents. This meta-analysis aims to provide a comprehensive asse...
scientiapsychiatrica.com
December 7, 2025 at 11:11 PM
Reposted by Solomon Kurz
dingdingpeng.the100.ci
in psych, whole subfields have decided to simply skirt the issue, so the causal inference happens in the introduction of the next paper that cites the "totally-not-causal-I-swear" paper and of course absolutely interprets it causally 🥲
The Taboo Against Explicit Causal Inference in Nonexperimental Psychology - Michael P. Grosz, Julia M. Rohrer, Felix Thoemmes, 2020
Causal inference is a central goal of research. However, most psychologists refrain from explicitly addressing causal research questions and avoid drawing causa...
journals.sagepub.com
December 7, 2025 at 10:19 AM
Reposted by Solomon Kurz
cghlewis.bsky.social
Opening a new dataset for cleaning.
a barbie doll says ohh myyyy with her hands in the air
ALT: a barbie doll says ohh myyyy with her hands in the air
media.tenor.com
December 5, 2025 at 1:48 PM
Reposted by Solomon Kurz
posit.co
📢 Announcement: We are sunsetting the bookdown.org public hosting service.

If you have #RStats docs on bookdown.org, please migrate them to a new platform by January 31, 2026, to maintain control over your content. (We recommend Posit Connect Cloud!)

Learn more: posit.co/blog/bookdown-org-sunset
Bookdown.org Sunset, January 31, 2026, over a stylized landscape with mountains and a lake.
December 5, 2025 at 4:01 PM
Reposted by Solomon Kurz
feadeh.bsky.social
Friends of Arab and Muslim descent, please fill out our survey! Please share!
December 4, 2025 at 9:42 PM
Reposted by Solomon Kurz
gidmk.bsky.social
I am not familiar enough with calcium scores to know if this is weird.

Is there any biochemical reason that all of these means/SDs would end in even numbers?
December 4, 2025 at 3:56 AM
Reposted by Solomon Kurz
ruben.the100.ci
Want to make nice graphs with me, starting next year? I'm hiring for a position at the University of Witten/Herdecke.
uni-wh.softgarden.io/job/61280592...
‘A fragmented field: Construct and measure proliferation in psychology.’ (2025) From ‘Language models accurately infer correlations between psychological items and scales from text alone.’ (2025) From ‘Not within spitting distance: salivary immunoassays of estradiol have subpar validity for predicting cycle phase.’ (2023) Work in progress with cycle tracking data from the app Clue
December 3, 2025 at 12:48 PM
Reposted by Solomon Kurz
ianhussey.mmmdata.io
Works the other way around too.

“If I was Jonathan Haidt, how would I destroy the next generation?”
December 2, 2025 at 3:35 PM
Reposted by Solomon Kurz
bigbookofr.com
Applied longitudinal data analysis in brms and the tidyverse by A Solomon Kurz
#RStats
https://bigbookofr.com/chapters/statistics.html#applied-longitudinal-data-analysis-in-brms-and-the-tidyverse
November 30, 2025 at 4:36 AM
Reposted by Solomon Kurz
ianhussey.mmmdata.io
"In 2019 we notified journals about serious integrity concerns in 172 clinical trials. Over five years later, only 22 have been retracted. The 135 unretracted trials have 1989 citations in systematic reviews, clinical guidelines, and consensus statements"

[paraphrased]
www.bmj.com/content/390/...
November 28, 2025 at 10:11 AM