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Estimating Ability with the Wrong Model.
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Wainer, Howard; Thissen, David – 1985
Using simulated item response data, the performance of several "robust" and conventional schemes for ability estimation was evaluated in conjunction with logistic item response theory models (one, two, and three parameter models). The simulated item response data were generated using a model that is more complex than are the usual…
Descriptors: Adaptive Testing, Adults, Computer Assisted Testing, Error of Measurement
Estimating Ability with Three Item Response Models when the Models are Wrong and Their Parameters are Inaccurate.
Jones, Douglas H.; And Others – 1984
How accurately ability is estimated when the test model does not fit the data is considered. To address this question, this study investigated the accuracy of the maximum likelihood estimator of ability for the one-, two- and three-parameter logistic (PL) models. The models were fitted into generated item characteristic curves derived from the…
Descriptors: Ability, Aptitude Tests, Error of Measurement, Estimation (Mathematics)