MirtTidyCoefSE: Get table of item parameters with standard errors

In CambridgeAssessmentResearch/unimirt: Applications of Unidimensional IRT using the R Package 'mirt'

Get table of item parameters with standard errors

Description

This function produces a slightly more condensed table of IRT item parameters than using the "coef" function. directly on a mirt object. IRT parameters are prefixed by 'a', 'g' or 'b'. Slope parameters are prefixed with an 'a', difficulty parameters with a 'b' and guessing parameters are labelled 'g'. Standard errors are included in the same table. Note that if the original IRT model was estimated without the option "SE=TRUE" then this function will give an error.

Usage

MirtTidyCoefSE(mirtobj)

Arguments

mirtobj

An estimated IRT model (of class SingleGroupClass) estimated either using mirt or unimirt.

Value

A data frame of item parameters and associated standard errors.

Examples

## Not run: 
mirt1=unimirt(mathsdata,"2",SE=TRUE)
MirtTidyCoefSE(mirt1)

## End(Not run)

CambridgeAssessmentResearch/unimirt documentation built on June 10, 2025, 6:03 a.m.