ERIC Number: ED243901
Record Type: Non-Journal
Publication Date: 1983-May
Reference Count: N/A
Confidence Envelopes for Item Response Theory. Technical Report No. 83-38.
Thissen, David; Wainer, Howard
A statistical method is described and illustrated which provides confidence envelopes around item response functions. Examples of 95 percent confidence envelopes for the one-, two-, and three-parameter logistic response models are given. In addition, the authors describe N-line plots, which show the genesis of the envelope as well as the density of lines in the confidence region. These too are illustrated for the one-, two-, and three-parameter logistic models. (Author)
Descriptors: Graphs, Latent Trait Theory, Mathematical Formulas, Mathematical Models, Regression (Statistics), Sampling
Educational Testing Service, Research Publications R-116, Princeton, NJ 08541.
Publication Type: Reports - Research
Education Level: N/A
Sponsor: Air Force Human Resources Lab., Brooks AFB, TX.
Authoring Institution: Educational Testing Service, Princeton, NJ. Program Statistics Research Project.