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Item Response Theory2
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Psychometrika2
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Chiu, Chia-Yi1
Douglas, Jeffrey A.1
Eggen, Theo J. H. M.1
Li, Xiaodong1
Verelst, Norman D.1
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Cluster Analysis for Cognitive Diagnosis: Theory and Applications
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Chiu, Chia-Yi; Douglas, Jeffrey A.; Li, Xiaodong – Psychometrika, 2009
Latent class models for cognitive diagnosis often begin with specification of a matrix that indicates which attributes or skills are needed for each item. Then by imposing restrictions that take this into account, along with a theory governing how subjects interact with items, parametric formulations of item response functions are derived and…
Descriptors: Test Length, Identification, Multivariate Analysis, Item Response Theory
Loss of Information in Estimating Item Parameters in Incomplete Designs
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Eggen, Theo J. H. M.; Verelst, Norman D. – Psychometrika, 2006
In this paper, the efficiency of conditional maximum likelihood (CML) and marginal maximum likelihood (MML) estimation of the item parameters of the Rasch model in incomplete designs is investigated. The use of the concept of F-information (Eggen, 2000) is generalized to incomplete testing designs. The scaled determinant of the F-information…
Descriptors: Test Length, Computation, Maximum Likelihood Statistics, Models