Jay Jeffries, PhD
@jaybenjeff.bsky.social
Doodle dad, psychometrics fan, #rstats nerd, and postdoc research scientist @nswers.bsky.social
Reposted by Jay Jeffries, PhD
NSWERS has released a new research brief examining chronic absenteeism in Nebraska’s K–12 schools and its effect on student outcomes, including assessment scores, graduation rates, and college enrollment. View the full brief here: insights.nswers.org/briefs/2025-....
October 7, 2025 at 3:20 PM
NSWERS has released a new research brief examining chronic absenteeism in Nebraska’s K–12 schools and its effect on student outcomes, including assessment scores, graduation rates, and college enrollment. View the full brief here: insights.nswers.org/briefs/2025-....
Reposted by Jay Jeffries, PhD
Grand Island linebacker Jim Jefferies celebrates in 1978.
September 24, 2025 at 7:30 PM
Grand Island linebacker Jim Jefferies celebrates in 1978.
Reposted by Jay Jeffries, PhD
A short explanation of p-hacking and why it absolutely makes sense to ask HHS to release the study methods of their autism report in advance.
September 6, 2025 at 12:15 PM
A short explanation of p-hacking and why it absolutely makes sense to ask HHS to release the study methods of their autism report in advance.
Reposted by Jay Jeffries, PhD
A short weekend post on a pet peeve of mine: likert questions
substack.com/@mzloteanu/n...
#substack #likert #design #science #research
substack.com/@mzloteanu/n...
#substack #likert #design #science #research
“We used a Likert scale to measure…” — No, you didn’t!
Understanding Likert, Likert-type, and Ordinal questions
substack.com
August 3, 2025 at 8:51 PM
Reposted by Jay Jeffries, PhD
I made one for stats papers
November 18, 2024 at 4:02 AM
I made one for stats papers
Reposted by Jay Jeffries, PhD
If researchers find Cohen’s d = 8, no they didn’t.
(probably.)
Thoughts on the distribution of Cohen's d values in psychology and why we should think about their plausibility when reading articles.
(probably.)
Thoughts on the distribution of Cohen's d values in psychology and why we should think about their plausibility when reading articles.
If researchers find Cohen's d = 8, no they didn't
I’ve spent a lot of time thinking about the plausibility of standardized effect sizes in the last year. From a trustworthiness assessment perspective, (standardized) effect sizes have a great combinat...
mmmdata.io
July 26, 2025 at 1:36 PM
If researchers find Cohen’s d = 8, no they didn’t.
(probably.)
Thoughts on the distribution of Cohen's d values in psychology and why we should think about their plausibility when reading articles.
(probably.)
Thoughts on the distribution of Cohen's d values in psychology and why we should think about their plausibility when reading articles.
Reposted by Jay Jeffries, PhD
note to self: 83.5% CIs will just touch 💏 at p = .05 www.tjmahr.com/unenv/#p-val...
Unevaluated expressions
www.tjmahr.com
July 24, 2025 at 5:27 PM
note to self: 83.5% CIs will just touch 💏 at p = .05 www.tjmahr.com/unenv/#p-val...
Reposted by Jay Jeffries, PhD
Here is my checklist summarising a small set of some of the simplest tasks you can do that have high potential to improve the reproducibility of your analysis code.
This is based on my year of reproducibility reviews for the J. of Archaeological Science:
authors.elsevier.com/a/1lHjN_6yUM... 🧪🏺
This is based on my year of reproducibility reviews for the J. of Archaeological Science:
authors.elsevier.com/a/1lHjN_6yUM... 🧪🏺
July 6, 2025 at 1:25 AM
Here is my checklist summarising a small set of some of the simplest tasks you can do that have high potential to improve the reproducibility of your analysis code.
This is based on my year of reproducibility reviews for the J. of Archaeological Science:
authors.elsevier.com/a/1lHjN_6yUM... 🧪🏺
This is based on my year of reproducibility reviews for the J. of Archaeological Science:
authors.elsevier.com/a/1lHjN_6yUM... 🧪🏺
Reposted by Jay Jeffries, PhD
Reposted by Jay Jeffries, PhD
Let us start 2025 in a positive mood: here are 10 methods things researchers can worry *less* about in 2025
a countdown clock with the number 10 in the center
ALT: a countdown clock with the number 10 in the center
media.tenor.com
December 23, 2024 at 10:36 AM
Let us start 2025 in a positive mood: here are 10 methods things researchers can worry *less* about in 2025
Reposted by Jay Jeffries, PhD
Yesterday, June 2, was an interesting day at work. I was reporting a story about how the Education Department hadn't delivered a report to Congress on the Condition of Education, despite the June 1 deadline mandated by law. 🧵 (1/9)
June 3, 2025 at 11:19 AM
Yesterday, June 2, was an interesting day at work. I was reporting a story about how the Education Department hadn't delivered a report to Congress on the Condition of Education, despite the June 1 deadline mandated by law. 🧵 (1/9)
Reposted by Jay Jeffries, PhD
Inkscape plugin to rescale figures without distorting the text, and other useful features!
github.com/burghoff/Sci...
github.com/burghoff/Sci...
June 2, 2025 at 12:15 PM
Inkscape plugin to rescale figures without distorting the text, and other useful features!
github.com/burghoff/Sci...
github.com/burghoff/Sci...
Reposted by Jay Jeffries, PhD
say it again:
4 million people work in higher ed, the largest employer in 10 states, second largest employer in 10 more, and in 60 of the 100 biggest cities
ROI for NIH and NSF for local economies is conservatively 4x, often close to 10x
demolishing higher education is economic sabotage
4 million people work in higher ed, the largest employer in 10 states, second largest employer in 10 more, and in 60 of the 100 biggest cities
ROI for NIH and NSF for local economies is conservatively 4x, often close to 10x
demolishing higher education is economic sabotage
There is a false dichotomy drawn between "the ivory tower" and "the real world," and I'm here to report that in a post-industrial society, your real-world economy absolutely hinges on the university.
University towns are factory towns. Universities drive economic activity, not the other way around.
University towns are factory towns. Universities drive economic activity, not the other way around.
A must read
May 18, 2025 at 1:45 PM
say it again:
4 million people work in higher ed, the largest employer in 10 states, second largest employer in 10 more, and in 60 of the 100 biggest cities
ROI for NIH and NSF for local economies is conservatively 4x, often close to 10x
demolishing higher education is economic sabotage
4 million people work in higher ed, the largest employer in 10 states, second largest employer in 10 more, and in 60 of the 100 biggest cities
ROI for NIH and NSF for local economies is conservatively 4x, often close to 10x
demolishing higher education is economic sabotage
Reposted by Jay Jeffries, PhD
A new use of the asterisk in the paper author list for credit assignment
May 18, 2025 at 6:23 PM
A new use of the asterisk in the paper author list for credit assignment
Reposted by Jay Jeffries, PhD
By slashing teams that gather critical data, the Trump administration has left the federal government with no way of understanding if policies are working — and created a black hole of information whose consequences could ripple out for decades: propub.li/3RZzqHP
📽️: @josesepulveda.bsky.social
📽️: @josesepulveda.bsky.social
May 10, 2025 at 1:31 AM
By slashing teams that gather critical data, the Trump administration has left the federal government with no way of understanding if policies are working — and created a black hole of information whose consequences could ripple out for decades: propub.li/3RZzqHP
📽️: @josesepulveda.bsky.social
📽️: @josesepulveda.bsky.social
Reposted by Jay Jeffries, PhD
Recently did the annual walk through of our totally normal publishing system for my undergraduate research methods students. Never fails to boggle their minds.
May 5, 2025 at 2:12 PM
Recently did the annual walk through of our totally normal publishing system for my undergraduate research methods students. Never fails to boggle their minds.
Reposted by Jay Jeffries, PhD
Train your own model.
April 19, 2025 at 2:19 PM
Train your own model.
Reposted by Jay Jeffries, PhD
I asked DeepSeek to develop a scale to measure addiction to addiction scale development and of course it delivered.
March 25, 2025 at 2:34 PM
I asked DeepSeek to develop a scale to measure addiction to addiction scale development and of course it delivered.
Reposted by Jay Jeffries, PhD
Let’s be clear: the Dept. of Ed. provides resources to 26 million children living in high-poverty school districts; Pell Grants to over 7 million students; & funding for millions of children with disabilities.
Closing its doors would be a disaster for working class families.
Closing its doors would be a disaster for working class families.
March 11, 2025 at 8:13 PM
Let’s be clear: the Dept. of Ed. provides resources to 26 million children living in high-poverty school districts; Pell Grants to over 7 million students; & funding for millions of children with disabilities.
Closing its doors would be a disaster for working class families.
Closing its doors would be a disaster for working class families.
Reposted by Jay Jeffries, PhD
🟣 This is the eighth interview in the BOLD series on our special collection. Catrin Finkenauer explains why schools and educators need to earn students’ trust—especially in those from financially insecure backgrounds—to prevent school dropout.
boldscience.org/why-schools-...
boldscience.org/why-schools-...
Why schools need to earn students’ trust
Students who distrust institutions are more likely to drop out of school
boldscience.org
March 2, 2025 at 7:27 PM
🟣 This is the eighth interview in the BOLD series on our special collection. Catrin Finkenauer explains why schools and educators need to earn students’ trust—especially in those from financially insecure backgrounds—to prevent school dropout.
boldscience.org/why-schools-...
boldscience.org/why-schools-...
Reposted by Jay Jeffries, PhD
A Guide to Multiverse Analyses
"The large array of defensible options available for researchers to select along the workflow creates what is known as the ‘garden of forking paths’."
Preprint: doi.org/10.31222/osf...
"The large array of defensible options available for researchers to select along the workflow creates what is known as the ‘garden of forking paths’."
Preprint: doi.org/10.31222/osf...
February 26, 2025 at 10:59 PM
A Guide to Multiverse Analyses
"The large array of defensible options available for researchers to select along the workflow creates what is known as the ‘garden of forking paths’."
Preprint: doi.org/10.31222/osf...
"The large array of defensible options available for researchers to select along the workflow creates what is known as the ‘garden of forking paths’."
Preprint: doi.org/10.31222/osf...
Reposted by Jay Jeffries, PhD
I always shock my students a bit when I tell them that quantitative data is just qualitative data that has already been interpreted numerically.
In case you need a teaching example of the social construction of quantitative data...
www.nytimes.com/2025/02/21/u...
www.nytimes.com/2025/02/21/u...
DOGE’s Only Public Ledger Is Riddled With Mistakes (Gift Article)
The figures from Elon Musk’s team of outsiders represent billions in government cuts. They are also full of accounting errors, outdated data and other miscalculations.
www.nytimes.com
February 22, 2025 at 2:29 PM
I always shock my students a bit when I tell them that quantitative data is just qualitative data that has already been interpreted numerically.
Reposted by Jay Jeffries, PhD
let's see what DOGE has been cancelling at the department of education. @stuartbuck.bsky.social went through the list. will link to his post at the end of the thread. i will start with his 4th example: foundational research to understand how american kids are doing at school
February 14, 2025 at 1:13 AM
let's see what DOGE has been cancelling at the department of education. @stuartbuck.bsky.social went through the list. will link to his post at the end of the thread. i will start with his 4th example: foundational research to understand how american kids are doing at school
Reposted by Jay Jeffries, PhD
more and more i'm gravitating towards the title of "data generalist." i do a little bit of everything. some things better than others. and the rest we'll figure out as we go.
February 12, 2025 at 1:53 AM
more and more i'm gravitating towards the title of "data generalist." i do a little bit of everything. some things better than others. and the rest we'll figure out as we go.
Reposted by Jay Jeffries, PhD
♓ Pisces (Feb 19 - Mar 20) → {quarto}
Dreamy, adaptable, sentimental. Loves a good narrative, but sometimes gets lost in the details. Might spend hours formatting a document instead of finishing the analysis. 📖✨ (4/13)
Dreamy, adaptable, sentimental. Loves a good narrative, but sometimes gets lost in the details. Might spend hours formatting a document instead of finishing the analysis. 📖✨ (4/13)
February 3, 2025 at 2:13 PM
♓ Pisces (Feb 19 - Mar 20) → {quarto}
Dreamy, adaptable, sentimental. Loves a good narrative, but sometimes gets lost in the details. Might spend hours formatting a document instead of finishing the analysis. 📖✨ (4/13)
Dreamy, adaptable, sentimental. Loves a good narrative, but sometimes gets lost in the details. Might spend hours formatting a document instead of finishing the analysis. 📖✨ (4/13)