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equateIRT (version 2.2.0)

IRT Equating Methods

Description

Computation of direct, chain and average (bisector) equating coefficients with standard errors using Item Response Theory (IRT) methods for dichotomous items (Battauz (2013) , Battauz (2015) ). Test scoring can be performed by true score equating and observed score equating methods. DIF detection can be performed using a Wald-type test (Battauz (2018) ).

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Version

Install

install.packages('equateIRT')

Monthly Downloads

703

Version

2.2.0

License

GPL-3

Maintainer

Michela Battauz

Last Published

May 31st, 2021

Functions in equateIRT (2.2.0)

bisectorec

Bisector Equating Coefficients
equateIRT-internal

Internal Functions of Package equateIRT
alldirec

Direct Equating Coefficients Between All Pairs of a List of Forms
eqc

Extract Equating Coefficients
chainec

Chain Equating Coefficients
dif.test

DIF Test
data2pl

Simulated Data Sets
dataDIF

Simulated Data Set with DIF
convert

Item Parameters Conversion
score

Scoring
modIRT

Estimated Coefficients and Covariance Matrix of IRT Models
direc

Direct Equating Coefficients
summary.meqc

Summarizing Bisector Equating Coefficients
import.ltm

Import Item Parameters Estimates and Covariance Matrices from IRT Software
summary.eqclist

Summarizing a List of Estimated Direct Equating Coefficients
id.test

Identity Test
itm

Extract Item Parameters
linkp

Linkage Plan
estrasch

Item Parameter Estimates and Covariance Matrices of a Rasch Model
equateIRT-package

IRT Equating Methods
est2pl

Item Parameter Estimates and Covariance Matrices of a Two-Parameter Logistic Model
est3pl

Item Parameter Estimates and Covariance Matrices of a Three-Parameter Logistic Model
summary.ceqclist

Summarizing a List of Estimated Chain Equating Coefficients
summary.eqc

Summarizing Estimated Equating Coefficients
summary.ceqc

Summarizing Estimated Chain Equating Coefficients
sd.test

Test on Chain Equating Coefficients