A Java library for classical test theory, item response theory, factor analysis, and other measurement techniques. It provide tools commonly used in psychometrics and operational testing programs.

R package for Rasch Measurement Theory based psychometrics, for use with the scientific publishing system Quarto.

Psychometric analyses of Stockholmsenkäten using Rasch Measurement Theory with R and Quarto

An implementation of the BUGS example LSAT: item response (http://www.openbugs.net/Examples/Lsat.html) on R. Parameters for the Rasch model are estimated using Maximum Marginal Likelihood as well as Bayesian Inference using jags and an implementation of Metropolis on R.

Fitting a 1PL IRT model (or Rasch model) using Turing.jl.

Various R scripts concerning psychometrics, Rasch, and other things

Psykometrisk analys Prevents enkät Säkerhetsvisaren 2.0

Psychometric analysis using Rasch methodology and open data for the AAQ-2