Estimation of the Operating Characteristics when the Test Information of the Old Test is not Constant. I. Rationale.
Abstract
Many combinations of a method and an approach for estimating the operating characteristics of the graded item responses, without assuming any mathematical forms, have been produced. In these methods, we need a set of items whose characteristics are known, or Old Test, which has a large, constant amount of test information throughout the interval of latent trait of our interest. In the present paper, the rationale is presented to generalize these methods so that they are made applicable when the test information of the Old Test is not constant. Both the transformation-free character of the maximum likelihood estimator and the method of moments for fitting a polynomial as the least squares solution play important roles in this rationale. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 16, 1980
- Accession Number
- ADA087075
Entities
People
- Fumiko Samejima
Organizations
- University of Tennessee