immer: Item Response Models for Multiple Ratings

Implements some item response models for multiple ratings, including the hierarchical rater model, conditional maximum likelihood estimation of linear logistic partial credit model and a wrapper function to the commercial FACETS program.

Version: 0.8-5
Depends: R (≥ 3.0-0)
Imports: CDM, coda, graphics, methods, psychotools, Rcpp, sirt, stats
LinkingTo: Rcpp, RcppArmadillo
Suggests: eRm, irr, TAM
Published: 2017-04-27
Author: Alexander Robitzsch [aut, cre], Jan Steinfeld [aut]
Maintainer: Alexander Robitzsch <robitzsch at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Materials: NEWS
In views: Psychometrics
CRAN checks: immer results


Reference manual: immer.pdf
Package source: immer_0.8-5.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X El Capitan binaries: r-release: immer_0.8-5.tgz
OS X Mavericks binaries: r-oldrel: immer_0.8-5.tgz
Old sources: immer archive


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