Package: plink Version: 1.5-1 Date: 2017-04-26 Title: IRT Separate Calibration Linking Methods Depends: R (>= 3.3.3), methods, lattice Imports: MASS, statmod Author: Jonathan P. Weeks Maintainer: Jonathan P. Weeks Description: Item response theory based methods are used 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 least squares method and extensions of the Haebara and Stocking-Lord method using single or multiple dilation parameters 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, information plots, and comparison plots for examining parameter drift. LazyLoad: Yes LazyData: Yes License: GPL (>= 2) NeedsCompilation: no Packaged: 2026-10-04 07:54:22 UTC; root Repository: https://bocaccio.r-universe.dev Date/Publication: 2017-04-26 15:36:59 UTC RemoteUrl: https://github.com/cran/plink RemoteRef: HEAD RemoteSha: d4ce5351b4dafbb5391a672d8ad27117bec16cfb