Jay Jeffries, PhD

“We used a Likert scale to measure…” — No, you didn’t! Understanding Likert, Likert-type, and Ordinal questions

A short weekend post on a pet peeve of mine: likert questions

substack.com/@mzloteanu/n...

#substack #likert #design #science #research

I made one for stats papers

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.

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note to self: 83.5% CIs will just touch 💏 at p = .05 www.tjmahr.com/unenv/#p-val...

Checklist of items researchers can do to improve the reproducibility of their code

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... 🧪🏺

Love this

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a countdown clock with the number 10 in the center ALT: a countdown clock with the number 10 in the center

Let us start 2025 in a positive mood: here are 10 methods things researchers can worry *less* about in 2025

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)

Inkscape plugin to rescale figures without distorting the text, and other useful features!
github.com/burghoff/Sci...

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

A new use of the asterisk in the paper author list for credit assignment

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

a slide showing the ridiculous process of publishing a journal article, highlighting how universities both pay for the work to be done and then pay to access the work.

Recently did the annual walk through of our totally normal publishing system for my undergraduate research methods students. Never fails to boggle their minds.

Although I have a *slight* preference for Mplus when conducting LPAs/LCAs, I have carried out LPAs using the tidyLPA package in R.

tidyLPA GitHub:
data-edu.github.io/tidyLPA/

Tutorial:
osf.io/wzftr/downlo...

A medical illustration of the human brain.

Train your own model.

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I asked DeepSeek to develop a scale to measure addiction to addiction scale development and of course it delivered.

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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.

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Why schools need to earn students’ trust Students who distrust institutions are more likely to drop out of school

🟣 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-...

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...

I always shock my students a bit when I tell them that quantitative data is just qualitative data that has already been interpreted numerically.

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

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.

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Perfect! 👌🏼

♓ 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)