Confidence Bands for the Three-Parameter Logistic Item Response Curve IRT
- Author(s):
- Lord, Frederic M.; Pashley, Peter J.
- Publication Year:
- 1988
- Report Number:
- RR-88-67
- Source:
- ETS Research Report
- Document Type:
- Report
- Page Count:
- 22
- Subject/Key Words:
- Item Response Theory (IRT), Maximum Likelihood Statistics, Statistics
Abstract
A large sample method for obtaining asymptotic simultaneous confidence bands for a three-parameter logistic response curve is described. A procedure is given which requires as input maximum likelihood parameter estimates and an asymptotic error covariance matrix. Illustrative plots of item response curves with corresponding confidence bands are presented. (22pp.)
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- http://dx.doi.org/10.1002/j.2330-8516.1988.tb00323.x