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Psychometrika

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Delbeke, Luc	1
Liu, Xiufeng	1
Storms, Gert	1

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The Dimensionality of Test Data Generated by Compensatory and Non-Compensatory Two-Dimensional IRT Models and Its Effect on Model-Data-Fit.

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Liu, Xiufeng – 1992

The difference between compensatory and non-compensatory item response theory (IRT) models in terms of the dimensionality of test data generated by them, and its effect on the model-data-fit were examined. The STRESS (proportion of variance not accounted for by the multidimensional scaling model) and RSQ (proportion of variance accounted for by…

Descriptors: Chi Square, Comparative Analysis, Computer Simulation, Foreign Countries

The Irrelevance of Distributional Assumptions on Reaction Times in Multidimensional Scaling of Same/Different Judgment Tasks.

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Storms, Gert; Delbeke, Luc – Psychometrika, 1992

Y. Takane and J. Sergent developed a model (MAXRT) for scaling same/different judgments and response times (RTs) simultaneously. The adequacy of the assumption that RTs are distributed log-normally is considered, and the effect of a violation of this assumption is investigated via a computer simulation. (SLD)

Descriptors: Computer Simulation, Equations (Mathematics), Goodness of Fit, Mathematical Models