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Polytomous Item Response Theory Models (Paperback, New)
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Polytomous Item Response Theory Models (Paperback, New)
Series: Quantitative Applications in the Social Sciences
Expected to ship within 12 - 17 working days
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Polytomous Item Response Theory Models provides a unified,
comprehensive introduction to the range of polytomous models
available within item response theory (IRT). It begins by outlining
the primary structural distinction between the two major types of
polytomous IRT models. This focuses on the two types of response
probability that are unique to polytomous models and their
associated response functions, which are modeled differently by the
different types of IRT model. It describes, both conceptually and
mathematically, the major specific polytomous models, including the
Nominal Response Model, the Partial Credit Model, the Rating Scale
model, and the Graded Response Model. Important variations, such as
the Generalized Partial Credit Model are also described as are less
common variations, such as the Rating Scale version of the Graded
Response Model. Relationships among the models are also
investigated and the operation of measurement information is
described for each major model. Practical examples of major models
using real data are provided, as is a chapter on choosing an
appropriate model. Figures are used throughout to illustrate
important elements as they are described.
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