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A Consumer's Guide to LOGIST and BILOG.

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Mislevy, Robert J.; Stocking, Martha L. – 1987

Since its release in 1976, LOGIST has been the most widely used computer program for estimating the parameters of the three-parameter logistic item response model developed by A. Birnbaum. An alternative program, BILOG, developed by R. J. Mislevy and R. D. Bock (1983), has recently become available. This paper compares the approaches taken by the…

Descriptors: Bayesian Statistics, Comparative Analysis, Computer Software, Estimation (Mathematics)

A Comparison of Item Parameter Estimates and Ability Parameter Estimates Obtained by Different Methods Implemented by BILOG.

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Buhr, Dianne C.; Algina, James – 1986

The focus of this study is on the estimation procedures implemented in BILOG, a computer program. One purpose is to compare the item parameter estimates produced by various procedures available in BILOG. Four different models are used: the one, two, and three parameter model and a three parameter model with common guessing parameters. The results…

Descriptors: Ability, Bayesian Statistics, Comparative Analysis, Computer Oriented Programs