ERIC Number: ED157937
Record Type: RIE
Publication Date: 1976
Reference Count: 0
Estimation of Latent Trait Status Using Adaptive Testing Procedures.
Sympson, James B.
Latent trait test score theory is discussed primarily in terms of Birnbaum's three-parameter logistic model, and with some reference to the Rasch model. Equations and graphic illustrations are given for item characteristic curves and item information curves. An example is given for a hypothetical 20-item adaptive test, showing cumulative results of ability estimates for one candidate under four methods: maximum likelihood estimates; weighted by likelihoods estimates; simplified Bayesian estimates; and Owen's normal ogive Bayesian estimates. Finally, information curves are given comparing a hypothetical 20-item adaptive test with information curves for a test with a broad rectangular item-difficulty distribution and a test with a peaked item-difficulty distribution. (CTM)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: N/A
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