On Keats' Generalization of the Rasch Model.

Colonius, Hans

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Peer reviewed

ERIC Number: EJ174694

Record Type: Journal

Publication Date: 1977

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On Keats' Generalization of the Rasch Model

Colonius, Hans

Psychometrika, 42, 3, 443-5, Sep 77

Parameter estimation for Keats generalization of the Rasch model that takes account of guessing behavior is investigated. It is shown that no minimal sufficient statistics for the ability parameters independent of the difficulty parameters exist. (Author/JKS)

Descriptors: Guessing (Tests), Item Analysis, Test Construction, Test Reliability

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