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catR (version 1.6)

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, next item selection routines, stopping rules and ability estimators.

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Version

Install

install.packages('catR')

Monthly Downloads

1,370

Version

1.6

License

GPL (>= 2)

Maintainer

David Magis

Last Published

April 11th, 2011

Functions in catR (1.6)

OIi

Observed information function (4PL)

eapEst

EAP ability estimation under the 4PL model

testList

Testing the format of the input lists

eapSem

Standard error of EAP ability estimation under the 4PL model

createItemBank

Item bank generation

nextItem

Selection of the next item

semTheta

Standard error of ability estimation under the 4PL model

EPV

Expected Posterior Variance (EPV)

tcals

Items parameters of the TCALS 1998 data set

MEI

(Maximum) Expected Information (MEI)

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

startItems

Selection of the first items

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

thetaEst

Ability estimation under the 4PL model

randomCAT

Random generation of adaptive tests

MWI

Maximum likelihood weighted information (MLWI) and maximum posterior weighted information (MPWI)