Mastodawn

I've made a Jamovi module for modern psychometric analysis using Rasch Measurement Theory, "easyRasch2jmv", that is available in Jamovi's library. The module implements simulation-based (dynamic) cutoff values for conditional item fit and residual correlations, amongst other things. #psychometrics

The "easyRasch2jmv" module currently contains only 5 of the functions from my package. I prioritized these functions to enable analysis of the 4 basic psychometric criteria:

- unidimensionality
- local independence of items
- ordered response category thresholds (monotonicity)
- invariance (no DIF)

Afaik, simulation-based cutoffs for Rasch model fit metrics is not available in any other software, except my github-only R-package easyRasch. Some more details on the topic: https://pgmj.github.io/rasch_itemfit/ and https://pgmj.github.io/simcutoffs.html

If you are new to Rasch psychometrics, you will find a fair amount of resources and analysis examples here:
https://pgmj.github.io/raschrvignette/RaschRvign.html

This module is built using R packages such as eRm, mirt, and iarm.

Detecting item misfit in Rasch models

PrismaTest 1d ago

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#bigfive #personality #psychology #psychometrics

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Erin Jonaitis 6d ago

Graphing question:

Let's say I have a bunch of Likert type items, on a scale from SA-SD, and I'm visualizing them with stoplight colors: SA/A in green, Neutral in yellow, D/SD in red. I've created a stacked barplot so we can easily view the fraction of favorable responses across the whole set of items, leaning on existing color semantics to make it easy to explain (conditional on having no R/G colorblind people in the audience... but it's a closed audience known to me).

Now let's say I also have some items where the "optimal" response from raters is the middle category, rather than at one end. I'd like to do something similar, if I can, so my readers don't need a whole new vocabulary. What sort of color scale makes sense, in this context? Normally, a diverging color gradient puts some unobtrusive color like white in the middle, but here, we want the middle to have a connotation of "positive" and the ends to have different negative connotations. Any ideas? (Or useful jargon for describing this type of item?)

#datavis #psychometrics

Jan R. Boehnke Apr 1

The 2025 Trevor Levere Best Paper Prize goes to the team of the paper "The drop and the metric system: how an unruly unit survived revolutions"
https://www.tandfonline.com/doi/full/10.1080/00033790.2026.2636886

This is really great news and is for an excellent paper that I highly recommend reading!

Working myself in an area that has at best non-standard measurement units (at worst, some people would argue, is not measurement at all), I found this very interesting.

#Measurement #Psychometrics
@philosophy

Nick Byrd, Ph.D.Mar 23

Join today's free webinar about "moral measurement"! I'm talking #psychometrics and data quality in the era of online experiments and AI. I review two problems, two solutions, and two resources.

Thanks to Penn State for hosting!

Pluralistic: Daily links from Cory Doctorow – No trackers, no ads. Black type, white background. Privacy policy: we don't collect or retain any data at all ever period.Mar 19

Pluralistic: Love of corporate bullshit is correlated with bad judgment (19 Mar 2026)

https://fed.brid.gy/r/https://pluralistic.net/2026/03/19/jargon-watch/

Jan R. Boehnke Mar 19

This paper suggests that the #HoNOS has limited utility for capturing psychopathology or monitoring progress in forensic outpatient settings
https://www.tandfonline.com/doi/full/10.1080/24732850.2026.2636142
Some items differentiated btw diagnostic groups, but limited evidence for use of 1 (to 3) summary scores

I admit having limited love for the instrument since our work on its use in secondary #MentalHealth care https://link.springer.com/article/10.1007/s10488-019-00958-7

More details, CHE working paper 137, pdf
https://www.york.ac.uk/media/che/documents/papers/researchpapers/CHERP137_mental_health_data_episodic_payment.pdf

#Psychometrics #Clinimetrics #LCA

Nick Byrd, Ph.D.Mar 16

Beaufort’s Wind Scale makes me want to add Likert levels.

Rate your agreement with “…”:
⚪️ slightly agree
⚪️ moderately agree
⚪️ FRESH agree
⚪️ strongly agree
⚪️ GALE FORCE agree
⚪️ VIOLENTLY agree
🔘 HURRICANE Agree

https://www.weather.gov/mfl/beaufort

#Psychometrics #Weather