[R-pkgs] New package: equate

From: Tony Albano <tony.d.albano_at_gmail.com>
Date: Fri, 26 Mar 2010 11:42:29 -0500

The 'equate' package, designed for statistical equating (non-IRT) of test score distributions, is available on CRAN: http://cran.r-project.org/package=equate

The package was developed for both research and teaching purposes, and will hopefully be useful for both. A vignette introduces the basic concepts and terminology of traditional equating, and demonstrates the functionality of the package.

Mean, linear, equipercentile, and circle-arc equating are supported and specific methods include Tucker, Levine observed score, Levine true score, Braun/Holland, frequency estimation, and chained equating (linear and nonlinear). Univariate and bivariate presmoothing are also supported, as is estimation of standard error via bootstrapping.

Additional info can be found at the rwiki: http://rwiki.sciviews.org/doku.php?id=packages:cran:equate

Suggestions are much appreciated!

Tony Albano

University of Minnesota
193 Education Sciences Building
56 East River Road
Minneapolis, MN 55455

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