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catR (version 1.4)

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

1.4

License

GPL (>= 2)

Maintainer

David Magis

Last Published

October 17th, 2010

Functions in catR (1.4)

thetaEst

Ability estimation under the 4PL model
Pi

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

Standard error of EAP ability estimation under the 4PL model
Ii

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

Selection of the first items
MWI

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

Selection of the next item
eapEst

EAP ability estimation under the 4PL model
OIi

Observed information function (4PL)
randomCAT

Random generation of adaptive tests
createItemBank

Item bank generation
tcals

Items parameters of the TCALS 1998 data set
semTheta

Standard error of ability estimation under the 4PL model
MEI

(Maximum) Expected Information (MEI)
testList

Testing the format of the input lists
EPV

Expected Posterior Variance (EPV)