itemperson_map: Item-Person Map for the Rasch Model and Its Variants

In cddesja/hemp: Handbook of Educational Measurement and Psychometrics Using R Companion Package

Description

Draws an item-person map for the Rasch Model and its variants using item difficulty parameters and latent trait estimates.

Usage

itemperson_map(x, y, k = 8, n = 10, ...)

Arguments

x	Item difficulty paramaters for the items
y	Latent trait (ability) estimates for persons
k	Number of classes when grouping items and persons
n	Number of persons represented by each X in the item-person map
...	Additional elements to pass to the plot function

Examples

## Item-person map for an exam with 15 items and 500 examinees
set.seed(355)
difficulty <- rnorm(15)
names(difficulty) <- 1:15
ability <- rnorm(500)
itemperson_map(difficulty,ability,main="Item-Person Map", n=20)

cddesja/hemp documentation built on April 7, 2021, 9:24 p.m.