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Tsai J (2026). tppcm: Step Discriminations for the Two-Parameter Partial Credit Model on Top of TAM. R package version 0.1.0.

Yu M (1991). A Two-Parameter Partial Credit Model. Ph.D. thesis, University of Illinois at Urbana-Champaign.

Corresponding BibTeX entries:

  @Manual{,
    title = {{tppcm}: Step Discriminations for the Two-Parameter
      Partial Credit Model on Top of {TAM}},
    author = {Jie-Wen Tsai},
    year = {2026},
    note = {R package version 0.1.0},
  }
  @PhdThesis{,
    title = {A Two-Parameter Partial Credit Model},
    author = {Min-Ning Yu},
    school = {University of Illinois at Urbana-Champaign},
    year = {1991},
  }

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