Facets is designed to handle applications of unidimensional many-facets Rasch measurement from the simple to the really tough. It constructs measures from complex data involving combinations of different facets, such as examinees, items, tasks, judges, along with further measurement and structural facets. It is designed to handle combinations of items of different formats in one analysis. Item types include dichotomies (rating scales with up to 255 categories), Poisson counts and Bernoulli trials.
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