ggtestinfo_se {tabledown}

A Function for Creating Publication Quality Item Response Theory based test information plot with standard error.

Description

This function will create publication worthy Item Response Theory based Test information plot with standard error using ggplot2 from objects created from mirt pack. Using ggplot2 will enable the user to modify the Item plot.

Usage

ggtestinfo_se(dataframe, model)

Arguments

dataframe

your data.

model

A mirt package fitted object.

Value

A publication quality Test information plot with standard error (dashed line). Output object is a ggplot object.

Examples

data <- tabledown::Rotter[, 11:31]
model <- mirt::mirt(data, model = 1, itemtype = '2PL')

plot <- ggtestinfo(data, model)