IRT.data.tam: Extracting Item Response Dataset

In alexanderrobitzsch/TAM: Test Analysis Modules

Extracting Item Response Dataset

Description

Extracts the used data set for models fitted in TAM. See CDM::IRT.data for more details.

Usage

## S3 method for class 'tam.mml'
IRT.data(object, ...)

## S3 method for class 'tam.mml.3pl'
IRT.data(object, ...)

## S3 method for class 'tamaan'
IRT.data(object, ...)

Arguments

object	Object of class tam, tam.mml, tam.mml.3pl or tamaan.
...	Further arguments to be passed

Value

A dataset with item responses

Examples

## Not run: 
#############################################################################
# EXAMPLE 1: Dichotomous data data.sim.rasch
#############################################################################

data(data.sim.rasch)
dat <- data.sim.rasch

# estimate model
mod1 <- TAM::tam.mml(dat)
# extract dataset (and weights and group if available)
dmod1 <- IRT.data(mod1)
str(dmod1)

## End(Not run)

alexanderrobitzsch/TAM documentation built on Feb. 21, 2024, 5:59 p.m.