A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data

resp

A rough estimate of the values of the latent variable ("ability").
The sum scores (number of correct responses) are ranked, breaking
ties at random. The ranks are divided by the sample size + 1, and
the corresponding quantiles of the standard Normal distribution
are returned. Used as default in the non-parametric IRF plots
produced by <code><a href="/link/npp?package=irtoys&version=0.1.4" rd-options="" data-mini-rdoc="irtoys::npp">npp</a></code> in analogy to Jim Ramsay's TestGraf.
Another possible use is in <code><a href="/link/itf?package=irtoys&version=0.1.4" rd-options="" data-mini-rdoc="irtoys::itf">itf</a></code>.

models

Provides a simple common interface to the estimation of
        item parameters in IRT models for binary responses with three
        different programs (ICL, BILOG-MG, and ltm, and a variety of
        functions useful with IRT models.

qrs: Quantiles of the ranked sum scores

Description

Usage

Arguments

Value

See Also

Examples