itemInfoPlot: Plotting item information curves

In masurp/ggmirt: Plotting functions to extend "mirt" for IRT analyses

Plotting item information curves

Description

This function takes a fitted mirt-model and visualizes items information curves.

Usage

itemInfoPlot(
  model,
  items = NULL,
  facet = FALSE,
  title = "Item Information Curves",
  theta_range = c(-4, 4),
  legend = FALSE
)

Arguments

model	an object of class SingleGroupClass returned by the function mirt().
items	numerical vector indicating which items to plot.
facet	Should all items be shown in one plot, or each item received its individal facet?
title	title for the plot (defaults to "Item Characteristic Curves")
theta_range	range to be shown on the x-axis

Value

a ggplot

Examples

library(mirt)
library(ggmirt)
data <- expand.table(LSAT7)
(mod <- mirt(data, 1))

itemInfoPlot(mod)

masurp/ggmirt documentation built on Oct. 14, 2023, 1:16 p.m.