Function reference • GRShiny

Simulation GRM data

Functions for simulating GRM data

genIRTpar(): Generate Item parameters

genTheta(): Generate individual true latent traits

genData(): Generate IRT data

Run GRM

Functions for conducting GRM

genLavSyn(): Generate lavaan syntax

runGRM(): Run graded response model

Tidy results

Functions for tidying GRM results

extract_est(): Clean output to look like Mplus

extract_fit(): Extract model fit

Make IRT plots

Functions for plotting GRM

ICCplot(): Plot ICC or OCC

ESplot(): Plot expected scores by items

infoPlot(): Calculate item information

FSplot(): Plot Factor score

Launch Shiny App

Functions for locally running Shiny application

startGRshiny(): This function will start GRShiny