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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. See Robitzsch and Steinfeld (2018) for a description of the functionality of the package. See Wang, Su and Qiu (2014; <doi:10.1111/jedm.12045>) for an overview of modeling alternatives.

README

# immer
#### Item Response Models for Multiple Ratings


If you use `immer` and have suggestions for improvement or have found bugs, please email me at robitzsch@leibniz-ipn.de.
Please always provide a minimal dataset, necessary to demonstrate the problem, 
a minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and
all necessary information on the used librarys, the R version, and the OS it is run on, perhaps a sessionInfo().

#### Manual

The manual may be found here [https://alexanderrobitzsch.github.io/immer/](https://alexanderrobitzsch.github.io/immer/) 

#### CRAN version

<!---
[![CRAN_Status_Badge](http://www.r-pkg.org/badges/version-last-release/immer)](https://cran.r-project.org/package=immer)
&#160;&#160;
-->

The official version of `immer` is hosted on CRAN and may be found [here](https://cran.r-project.org/package=immer). 
The CRAN version can be installed from within R using:

```r
utils::install.packages("immer")
```

#### GitHub version

The version hosted [here](https://github.com/alexanderrobitzsch/immer) is the development version of `immer`. 
The GitHub version can be installed using `devtools` as:

```r
devtools::install_github("alexanderrobitzsch/immer")
```

Versions across snapshots

Version Repository File Size

1.5-13 rolling linux/jammy R-4.5 immer_1.5-13.tar.gz 415.5 KiB

1.5-13 rolling linux/noble R-4.5 immer_1.5-13.tar.gz 910.8 KiB

1.5-13 rolling source/ R- immer_1.5-13.tar.gz 415.5 KiB

1.5-13 latest source/ R- immer_1.5-13.tar.gz 415.5 KiB

1.5-13 latest linux/jammy R-4.5 immer_1.5-13.tar.gz 415.5 KiB

1.5-13 latest linux/noble R-4.5 immer_1.5-13.tar.gz 910.8 KiB

1.5-13 2026-04-26 source/ R- immer_1.5-13.tar.gz 415.5 KiB

1.5-13 2026-04-23 source/ R- immer_1.5-13.tar.gz 415.5 KiB

1.5-13 2026-04-09 windows/windows R-4.5 immer_1.5-13.zip 1.1 MiB

1.5-13 2025-04-20 source/ R- immer_1.5-13.tar.gz 415.5 KiB

Version	Repository	File	Size
`1.5-13`	rolling linux/jammy R-4.5	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	rolling linux/noble R-4.5	`immer_1.5-13.tar.gz`	910.8 KiB
`1.5-13`	rolling source/ R-	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	latest source/ R-	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	latest linux/jammy R-4.5	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	latest linux/noble R-4.5	`immer_1.5-13.tar.gz`	910.8 KiB
`1.5-13`	2026-04-26 source/ R-	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	2026-04-23 source/ R-	`immer_1.5-13.tar.gz`	415.5 KiB
`1.5-13`	2026-04-09 windows/windows R-4.5	`immer_1.5-13.zip`	1.1 MiB
`1.5-13`	2025-04-20 source/ R-	`immer_1.5-13.tar.gz`	415.5 KiB

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