ExpectedScoreCompare: Plot comparing expected total scores on common items between...

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

Plot comparing expected total scores on common items between mirt objects

Description

Common items are identified automatically on the basis of shared variable names.

Usage

ExpectedScoreCompare(mirtobj1, mirtobj2, lab1 = NULL, lab2 = NULL)

Arguments

mirtobj1	An estimated IRT model (of class SingleGroupClass) estimated either using the function "unimirt" or by applying the function "mirt" directly.
mirtobj2	An estimated IRT model (of class SingleGroupClass) estimated either using the function "unimirt" or by applying the function "mirt" directly.
lab1	Optional character string that can be added to change labelling of object 1 in the chart.
lab2	Optional character string that can be added to change labelling of object 2 in the chart.

Examples

## Not run: 
mirt1=unimirt(mathsdata[1:250,1:10])
mirt2=unimirt(mathsdata[251:500,6:15])
ExpectedScoreCompare(mirt1,mirt2)

mirt2.rescale=MirtObjectRecalibrate(mirt1,mirt2)
ExpectedScoreCompare(mirt1,mirt2.rescale)

## End(Not run)

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