Science

A 4 item data set borrowed from <code><a href="/link/ltm?package=mirt&version=0.2.6&to=ltm" rd-options="ltm" data-mini-rdoc="ltm::ltm">ltm</a></code>
  package, first example of the <code><a href="/link/grm?package=mirt&version=0.2.6&to=ltm" rd-options="ltm" data-mini-rdoc="ltm::grm">grm</a></code>
  function. See more complete documentation therein.

datasets

data

Analysis of dichotomous and polychotomous response data
        using latent trait models under the Item Response Theory
        paradigm. Includes the multivariate two- and three-parameter
        logistic models, confirmatory bifactor analysis, polytomous
        exploratory and confirmatory item response models which may
        include polynomial or product constructed factors, and
        partially-compensatory item response modeling in conjunction
        with other IRT models.

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Science: Description of Science data

Description

Arguments