To cite irtsim in publications, please use:

Ward S (2026). irtsim: Monte Carlo Simulation-Based Sample-Size Planning for Item Response Theory. R package version 0.1.1, https://github.com/sward1/irtsim.

The methodological framework implemented by irtsim is described in:

Schroeders U, Gnambs T (2025). “Sample size planning in item response theory: A 10-decision framework.” Advances in Methods and Practices in Psychological Science. doi:10.1177/25152459251314798.

Corresponding BibTeX entries:

  @Manual{,
    title = {irtsim: Monte Carlo Simulation-Based Sample-Size Planning
      for Item Response Theory},
    author = {Stephen Ward},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/sward1/irtsim},
  }

  @Article{,
    title = {Sample size planning in item response theory: A
      10-decision framework},
    author = {Ulrich Schroeders and Timo Gnambs},
    journal = {Advances in Methods and Practices in Psychological
      Science},
    year = {2025},
    doi = {10.1177/25152459251314798},
  }