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The IRT models

Source: R/fct_questionnaire.R
irt_models.Rd

The six models a questionnaire can use, with the mirt itemtypes that map to each one.

Usage

irt_models()

Value

A data frame: model (the engine), label and itemtypes.

See also

Other questionnaire: example_questionnaires(), questionnaire_from_mirt(), read_questionnaire(), validate_questionnaire_against_mirt(), write_questionnaire()

Examples

irt_models()
#>         model                                 label                           itemtypes
#> 1         rsm              Rating scale model (RSM)                                 rsm
#> 2         pcm            Partial credit model (PCM)               Rasch (3+ categories)
#> 3         grm           Graded response model (GRM)                              graded
#> 4        mgrm Modified graded response model (MGRM)                                grsm
#> 5 dichotomous              Dichotomous (1PL to 4PL) Rasch (2 categories), 2PL, 3PL, 4PL
#> 6         nrm          Nominal response model (NRM)                             nominal