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To cite eirm in your publications, use:

Bulut O (2021). eirm: Explanatory item response modeling for dichotomous and polytomous item responses. doi:10.5281/zenodo.4556285, R package version 0.3.0, https://CRAN.R-project.org/package=eirm.

Bulut O, Gorgun G, Yildirim-Erbasli SN (2021). “Estimating explanatory extensions of dichotomous and polytomous Rasch models: The eirm package in R.” Psych, 3(3), 308-321. doi:10.3390/psych3030023.

Stanke L, Bulut O (2019). “Explanatory item response models for polytomous item responses.” International Journal of Assessment Tools in Education, 6(2), 259-278. doi:10.21449/ijate.515085.

Corresponding BibTeX entries:

  @Manual{,
    title = {{eirm}: Explanatory item response modeling for dichotomous
      and polytomous item responses},
    author = {Okan Bulut},
    year = {2021},
    doi = {10.5281/zenodo.4556285},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=eirm},
  }
  @Article{,
    author = {Okan Bulut and Guher Gorgun and Seyma Nur
      Yildirim-Erbasli},
    title = {Estimating explanatory extensions of dichotomous and
      polytomous Rasch models: The eirm package in R},
    journal = {Psych},
    year = {2021},
    volume = {3},
    number = {3},
    pages = {308-321},
    doi = {10.3390/psych3030023},
  }
  @Article{,
    author = {Luke Stanke and Okan Bulut},
    title = {Explanatory item response models for polytomous item
      responses},
    journal = {International Journal of Assessment Tools in Education},
    year = {2019},
    volume = {6},
    number = {2},
    pages = {259-278},
    doi = {10.21449/ijate.515085},
  }

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.