The item characteristic curve is performed for the multidimensional polytomous Rasch model or the continuous Rating Scale Model.
# S3 method for CRSM
iccplot(object, items = "all", ...)# S3 method for DRM
iccplot(object, items = "all", ...)
# S3 method for MPRM
iccplot(object, items = "all", ...)
iccplot(object, ...)
Object of class CRSM for ICC of the
CRSM or object of class MPRM for ICC plot of the MPRM or object of class DRM for ICC plot of the DRM
Character vector "all" to display ICC curves for all items. By entering a numeric vector, a subset of items
can be chosen for which ICC plots are drawn.
…
The item characteristic curve (ICC) plots the response probability depending on person and item parameter.
For plotting the ICC, the object resulting from MPRM MPRM or CRSM CRSM or DRM DRM is the input for the iccplot function.
The default argument items="all" displays ICC curves for all items in the object. With a numeric vector items, a subset of
items can be selected for which ICC plots are displayed.