Abstract

KLEIN, Ruben  and  RICARTE, Thales Akira. Fixed item parameter calibration. Ensaio: aval. pol. públ. educ. [online]. 2025, vol.33, n.127, e0255144.  Epub Apr 09, 2025. ISSN 1809-4465.  https://doi.org/10.1590/s0104-40362025003305144.

This paper focus on a FIPC (Fixed item parameter estimation) of an IRT (Item Response Theory) model. This shows how to use the R packages mirt and irtplay and by simulation that its results are equivalent to the method of multiple groups, where one of the groups is the group of origin of the common items with all parameters known.

Keywords : FIPC; TRI; Mirt; Irtplay; Multiple groups.

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