Accession Number : ADA114995

Title :   Statistical Bias in Maximum Likelihood Estimators of Item Parameters.

Descriptive Note : Technical rept.,

Corporate Author : EDUCATIONAL TESTING SERVICE PRINCETON NJ

Personal Author(s) : Lord,Frederic M

PDF Url : ADA114995

Report Date : Apr 1982

Pagination or Media Count : 37

Abstract : Formulas are derived for the bias in the maximum likelihood estimators of the item parameters in the logistic item response model when examinee abilities are known. Numerical results are given for a typical verbal test for college admission. (Author)

Descriptors :   *Statistical analysis, *Bias, *Estimates, *Acceptance tests, Test methods, Numerical analysis, Statistics, Models, Response, Verbal behavior, Logistics, Achievement tests, Education, Theory

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE