Statistical Methods for Test Score Equating
The equate package contains functions for non-IRT equating
under both random groups and nonequivalent groups with anchor
test designs. Mean, linear, equipercentile and circle-arc
equating are supported, as are methods for univariate and
bivariate presmoothing of score distributions. Specific
equating methods currently supported include Tucker, Levine
observed score, Levine true score, Braun/Holland, frequency
estimation, and chained equating.

The equate package contains functions for non-IRT equating
under both random groups and nonequivalent groups with anchor
test designs. Mean, linear, equipercentile and circle-arc
equating are supported, as are methods for univariate and
bivariate presmoothing of score distributions. Specific
equating methods currently supported include nominal weights,
Tucker, Levine observed score, Levine true score,
Braun/Holland, frequency estimation, and chained equating.

The equate package contains functions for non-IRT equating
under both random groups and nonequivalent groups with anchor
test designs. Mean, linear, equipercentile and circle-arc
equating are supported, as are methods for univariate and
bivariate presmoothing of score distributions. Specific
equating methods currently supported include synthetic, nominal
weights, Tucker, Levine observed score, Levine true score,
Braun/Holland, frequency estimation, and chained equating.

The equate package contains functions for
non-IRT equating under equivalent and nonequivalent
groups with anchor test designs. Mean, linear,
equipercentile and circle-arc equating are supported,
as are methods for univariate and bivariate presmoothing
of score distributions. Specific equating methods
currently supported include synthetic, nominal weights,
Tucker, Levine observed score, Levine true score,
Braun/Holland, frequency estimation, and chained equating.

The equate package contains methods for
observed-score linking and equating under the single-
group, equivalent-groups, and nonequivalent-groups
designs. Equating types include identity, mean, linear,
general linear, equipercentile, circle-arc, and
composites of these. Equating methods include synthetic,
nominal weights, Tucker, Levine observed score, Levine
true score, Braun/Holland, frequency estimation, and
chained equating. Plotting and summary methods, and
methods for univariate and bivariate presmoothing are
also provided.