R, Rasch, etc
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    • Rasch analysis with Bayesian and frequentist methods
    • RMU — relative measurement uncertainty
    • Automating reports with Quarto
    • What’s in a latent trait score?
    • Data retrieval with R using API calls
    • Power analysis for multilevel models
    • Data wrangling for psychometrics in R
    • Simulation based cutoff values for Rasch item fit and residual correlations
    • Comparing Rasch packages/estimators
    • Rasch DIF magnitude & item split
    • Conditional Likelihood Ratio Test and sample size

Note: MacOS users of easyRasch should upgrade package vcdExtra to avoid error messages from iarm

About

Magnus Johansson is a licensed psychologist with a PhD in behavior analysis. I work as a research specialist in psychometrics and statistics at Karolinska Institutet, Centre for Psychiatry Research, Department of Clinical Neuroscience.

You can also find me on:

  • Bluesky: @pgmj.bsky.social
  • ORCID: 0000-0003-1669-592X
  • Mastodon: @pgmj
  • OSF: Open Science Framework

and of course on GitHub

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---
title: "About"
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[Magnus Johansson](https://ki.se/en/people/magnus-johansson-3) is a licensed psychologist with a PhD in behavior analysis. I work as a research specialist in psychometrics and statistics at Karolinska Institutet, Centre for Psychiatry Research, Department of Clinical Neuroscience.

You can also find me on:

- Bluesky: [@pgmj.bsky.social](https://bsky.app/profile/pgmj.bsky.social) 
- ORCID: [0000-0003-1669-592X](https://orcid.org/0000-0003-1669-592X)
- Mastodon: [@pgmj](https://scicomm.xyz/@pgmj)
- OSF: [Open Science Framework](https://osf.io/8u2x3/)

and of course on [GitHub](https://github.com/pgmj)