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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a114995.pdf


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