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| Educational Measurement:… | 1 |
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| Harris, Deborah | 1 |
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Peer reviewedHarris, Deborah – Educational Measurement: Issues and Practice, 1989
This instructional module discusses the one-, two-, and three-parameter logistic item response theory (IRT) models. Mathematical formulas are given for each model and they are compared, with figures illustrating the effects of changing parameters. A single data set is used to demonstrate the effects of changing parameter values. (SLD)
Descriptors: Comparative Analysis, Equations (Mathematics), Estimation (Mathematics), Instructional Materials
