sim: Simulate response data

In lebebr01/irtoys-2: Simple interface to the estimation and plotting of IRT models

Description

Simulate responses from the 1PL, 2PL, or 3PL model

Usage

  sim(ip, x = NULL)

Arguments

ip	Item parameters: a matrix with one row per item, and three columns: [,1] item discrimination a, [,2] item difficulty b, and [,3] asymptote c.
x	A vector of values of the latent variable ("abilities").

Value

A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data

Author(s)

Ivailo Partchev

Examples

pa <- cbind(runif(20,.8,2), runif(20,-2.4,2.4), rep(0,50))
rs <- sim(ip=pa, x=rnorm(1000))

lebebr01/irtoys-2 documentation built on May 20, 2019, 11:29 p.m.