ERIC Number: ED214947
Record Type: Non-Journal
Publication Date: 1981-Nov
Reference Count: N/A
Standard Error of an Equating by Item Response Theory.
Lord, Frederic M.
A formula is derived for the asymptotic standard error of a true-score equating by item response theory (IRT). The equating method is applicable when the two tests to be equated are administered to different groups along with an "anchor test." Numerical standard errors are shown for an actual equating 1) comparing the standard errors of IRT, linear, and equipercentile methods; 2) illustrating the effect of the length of the anchor test on the standard error of the equating. (Author/BW)
Publication Type: Reports - Research
Education Level: N/A
Sponsor: Office of Naval Research, Arlington, VA. Personnel and Training Research Programs Office.
Authoring Institution: Educational Testing Service, Princeton, NJ.