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catR (version 1.1)

Procedures to generate IRT adaptive tests (CAT)

Description

The catR package allows the generation of response patterns under computerized adaptive testing (CAT) framework, with the choice of several starting rules, stopping rules and ability estimators.

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Version

Install

install.packages('catR')

Monthly Downloads

1,370

Version

1.1

License

GPL (>= 2)

Maintainer

David Magis

Last Published

August 27th, 2010

Functions in catR (1.1)

Ii

Item information functions, first and second derivatives (4PL)
semTheta

Standard error of ability estimation under the 4PL model
Pi

Item response probabilities, first, second and third derivatives (4PL)
testList

Testing the format of the input lists
createItemBank

Item bank generation
startItems

Selection of the first items
tcals

Items parameters of the TCALS 1998 data set
thetaEst

Ability estimation under the 4PL model
nextItem

Selection of the next item
randomCAT

Random generation of adaptive tests
eapEst

EAP ability estimation under the 4PL model
eapSem

Standard error of EAP ability estimation under the 4PL model