ERIC Number: ED079356
Record Type: RIE
Publication Date: 1973-Jun
Reference Count: 0
The Relative Efficiency of Two Tests as a Function of Ability Level.
Lord, Frederic M.
A new formula is developed for the relative efficiency of two tests measuring the same trait. The formula expresses relative efficiency solely in terms of the standard errors of measurement and, surprisingly, the frequency distributions of true scores. Approximate methods for estimating relative efficiency may make this function routinely available. A numerical illustration compares new and old estimates of relative efficiency for subtests from the Scholastic Aptitude Test. (Author)
Publication Type: N/A
Education Level: N/A
Sponsor: National Science Foundation, Washington, DC.
Authoring Institution: Educational Testing Service, Princeton, NJ.