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catR (version 1.3)

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

1.3

License

GPL (>= 2)

Maintainer

David Magis

Last Published

October 8th, 2010

Functions in catR (1.3)

semTheta

Standard error of ability estimation under the 4PL model

eapSem

Standard error of EAP ability estimation under the 4PL model

eapEst

EAP ability estimation under the 4PL model

tcals

Items parameters of the TCALS 1998 data set

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

testList

Testing the format of the input lists

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

MEI

(Maximum) Expected Information (MEI)

createItemBank

Item bank generation

thetaEst

Ability estimation under the 4PL model

EPV

Expected Posterior Variance (EPV)

nextItem

Selection of the next item

randomCAT

Random generation of adaptive tests

MWI

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

startItems

Selection of the first items

OIi

Observed information function (4PL)