Standard and Nonstandard Statistical Models and Methods for Test Equating

Contains functions to perform various models and methods for test equating. It currently implements the traditional mean, linear and equipercentile equating methods, as well as the mean-mean, mean-sigma, Haebara and Stocking-Lord IRT linking methods. It also supports newest methods such that local equating, kernel equating (using Gaussian, logistic and uniform kernels) with presmoothing, and IRT parameter linking methods based on asymmetric item characteristic functions. Functions to obtain both standard error of equating (SEE) and standard error of equating difference between two equating functions (SEED) are also implemented for the kernel method of equating.


Reference manual

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1.3.1 by Jorge Gonzalez Burgos, 10 days ago

Browse source code at

Authors: Jorge Gonzalez Burgos [cre, aut], Daniel Leon Acuna [ctb]

Documentation:   PDF Manual  

Task views: Psychometric Models and Methods

GPL (>= 2) license

Imports methods, emdbook, plyr, progress, knitr, statmod

Depends on magic, stats

Suggests testthat

See at CRAN