runGRM {GRShiny}

Run graded response model

Description

Run graded response model

Usage

runGRM(dat, lav.syntax, estimator)

Arguments

dat

a data frame containing graded response model data

lav.syntax

a character indicating lavaan syntax

estimator

a character indicating the type of estimator.

• ML Maximum likelihood estimation

• WL Weighted least squares mean and variance

Details

This conducts GRM. The second element of the return indicates the graded response parameters converted from the CFA parameters

Value

a list containing GRM results as follows:

• fit an object from either SingleGroupClass from mirt or codelavaan from from lavaan.

• grm.par a data frame indicating graded response parameters.