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equateIRT (version 2.0)

Direct, Chain and Average Equating Coefficients with Standard Errors Using IRT Methods

Description

Computation of direct, chain and average (bisector) equating coefficients with standard errors using Item Response Theory (IRT) methods for dichotomous items. Test scoring can be performed by true score equating and observed score equating methods.

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Version

Install

install.packages('equateIRT')

Monthly Downloads

703

Version

2.0

License

GPL (>= 2)

Maintainer

Michela Battauz

Last Published

March 30th, 2016

Functions in equateIRT (2.0)

est2pl

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

Extract Equating Coefficients
alldirec

Direct Equating Coefficients Between All Pairs of a List of Forms
data2pl

Simulated Data Sets
convert

Item Parameters Conversion
linkp

Linkage Plan
modIRT

Estimated Coefficients and Covariance Matrix of IRT Models
summary.meqc

Summarizing Bisector Equating Coefficients
direc

Direct Equating Coefficients
summary.eqclist

Summarizing a List of Estimated Direct Equating Coefficients
chainec

Chain Equating Coefficients
import.ltm

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

Summarizing a List of Estimated Chain Equating Coefficients
summary.ceqc

Summarizing Estimated Chain Equating Coefficients
itm

Extract Item Parameters
equateIRT-internal

Internal Functions of Package equateIRT
equateIRT-package

Direct, Chain and Average Equating Coefficients with Standard Errors Using IRT Methods.
score

Scoring
bisectorec

Bisector Equating Coefficients
est3pl

Item Parameter Estimates and Covariance Matrices of a Three-Parameter Logistic Model
estrasch

Item Parameter Estimates and Covariance Matrices of a Rasch Model
summary.eqc

Summarizing Estimated Equating Coefficients