Estimation of a four-parameter item response theory model

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Estimation of a four-parameter item response theory model.

We explore the justification and formulation of a four-parameter item response theory model (4PM) and employ a Bayesian approach to recover successfully parameter estimates for items and respondents. For data generated using a 4PM item response model, overall fit is improved when using the 4PM rather than the 3PM or the 2PM. Furthermore, although estimated trait scores under the various models ...

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ژورنال

عنوان ژورنال: British Journal of Mathematical and Statistical Psychology

سال: 2010

ISSN: 0007-1102

DOI: 10.1348/000711009x474502