TAM (version 1.6-0)

IRT.factor.scores: Extracting Factor Scores in TAM

Description

Extracts factor scores for models fitted in TAM. See IRT.factor.scores (CDM) for more details.

Usage

## S3 method for class 'tam':
IRT.factor.scores(object, type="EAP", \dots)

## S3 method for class 'tam.mml':
IRT.factor.scores(object, type="EAP", \dots)

## S3 method for class 'tam.mml.3pl':
IRT.factor.scores(object, type="EAP", \dots)

## S3 method for class 'tamaan':
IRT.factor.scores(object, type="EAP", \dots)

Arguments

object

Object of class tam, tam.mml, tam.mml.3pl or tamaan.

type

Type of factor score to be used. type="EAP" can be used for all classes in TAM while type="WLE" and type="MLE" can only be used for objects of class tam.mml

...

Further arguments to be passed

Value

• See IRT.factor.scores (CDM).

Examples

#############################################################################
# EXAMPLE 1: sim.rasch - Different factor scores in Rasch model 
#############################################################################
	
data(sim.rasch)
# 1PL estimation
mod1 <- tam.mml(resp=sim.rasch)
# EAP
pmod1 <- IRT.factor.scores( mod1 )
# WLE
pmod1 <- IRT.factor.scores( mod1 , type="WLE" )
# MLE
pmod1 <- IRT.factor.scores( mod1 , type="MLE" )