https://forsbergpsychometrics.r-universe.devRecent package updates in forsbergpsychometricsR-universehttps://github.com/forsbergpsychometrics.pnghttps://forsbergpsychometrics.r-universe.devSun, 07 Jun 2026 10:59:38 GMTforsbergpsychometrics@gmail.com (Erik Forsberg)For identifying, estimating, and plotting descriptive multidimensional item response theory models, restricted to 3D and dichotomous or polytomous data that fit the two-parameter logistic model or the graded response model. The method is primarily exploratory and centered on the plot function, which exposes item characteristics and constructs, represented by vector arrows, within a three-dimensional interactive latent space. The results can be useful for item-level analysis as well as test development.https://github.com/r-universe/forsbergpsychometrics/actions/runs/27406070205Sun, 07 Jun 2026 10:59:38 GMTD3mirt2.0.5.9000successhttps://forsbergpsychometrics.r-universe.devhttps://github.com/forsbergpsychometrics/d3mirtIntrotoD3mirt.pdf.asisIntrotoD3mirt.pdfIntroduction to D3mirt2024-06-19 14:14:212026-06-05 17:04:49