Package: plink
Version: 1.2-5
Date: 2010-08-12
Title: IRT Separate Calibration Linking Methods
Depends: R (>= 2.11.1), methods, lattice
Imports: MASS, statmod
Author: Jonathan P. Weeks <weeksjp@gmail.com>
Maintainer: Jonathan P. Weeks <weeksjp@gmail.com>
Description: This package uses item response theory methods to compute
linking constants and conduct chain linking of unidimensional
or multidimensional tests for multiple groups under a common
item design.  The unidimensional methods include the Mean/Mean,
Mean/Sigma, Haebara, and Stocking-Lord methods for dichotomous
(1PL, 2PL and 3PL) and/or polytomous (graded response, partial
credit/generalized partial credit, nominal, and multiple-choice
model) items.  The multidimensional methods include the
Reckase-Martineau method and extensions of the Haebara and
Stocking-Lord method using a single dilation parameter,
multiple dilation parameters, or the Oshima, Davey, & Lee
approach for multidimensional extensions of all the
unidimensional dichotomous and polytomous item response models.
The package also includes functions for importing item and/or
ability parameters from common IRT software, conducting IRT
true score and observed score equating, and plotting item
response curves/surfaces, vector plots, and comparison plots
for examining parameter drift.
LazyLoad: Yes
LazyData: Yes
License: GPL (>= 2)
Packaged: 2010-08-12 17:17:51 UTC; Jonathan Weeks
Repository: CRAN
Date/Publication: 2010-08-13 18:31:11

Package: plink
Version: 1.2-6
Date: 2010-09-15
Title: IRT Separate Calibration Linking Methods
Depends: R (>= 2.11.1), methods, lattice
Imports: MASS, statmod
Author: Jonathan P. Weeks <weeksjp@gmail.com>
Maintainer: Jonathan P. Weeks <weeksjp@gmail.com>
Description: This package uses item response theory methods to compute
linking constants and conduct chain linking of unidimensional
or multidimensional tests for multiple groups under a common
item design.  The unidimensional methods include the Mean/Mean,
Mean/Sigma, Haebara, and Stocking-Lord methods for dichotomous
(1PL, 2PL and 3PL) and/or polytomous (graded response, partial
credit/generalized partial credit, nominal, and multiple-choice
model) items.  The multidimensional methods include the
Reckase-Martineau method and extensions of the Haebara and
Stocking-Lord method using a single dilation parameter,
multiple dilation parameters, or the Oshima, Davey, & Lee
approach for multidimensional extensions of all the
unidimensional dichotomous and polytomous item response models.
The package also includes functions for importing item and/or
ability parameters from common IRT software, conducting IRT
true score and observed score equating, and plotting item
response curves/surfaces, vector plots, and comparison plots
for examining parameter drift.
LazyLoad: Yes
LazyData: Yes
License: GPL (>= 2)
Packaged: 2010-09-15 11:07:07 UTC; Jonathan Weeks
Repository: CRAN
Date/Publication: 2010-09-15 12:06:16