Package: plink
Version: 1.2-1
Date: 2009-09-28
Title: IRT Separate Calibration Linking Methods
Depends: R (>= 2.9.2), methods, statmod, lattice, MASS
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 ploting item
response curves/surfaces, vector plots, and comparison plots
for examining parameter drift.
LazyLoad: Yes
LazyData: Yes
License: GPL (>= 2)
Packaged: 2009-09-28 20:03:59 UTC; Jonathan Weeks
Repository: CRAN
Date/Publication: 2009-09-29 18:49:29

Package: plink
Version: 1.2-2
Date: 2009-10-23
Title: IRT Separate Calibration Linking Methods
Depends: R (>= 2.9.2), methods, statmod, lattice, MASS
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: 2009-10-23 15:44:30 UTC; Jonathan Weeks
Repository: CRAN
Date/Publication: 2009-10-23 18:07:32