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)
Authors
- Authorizing Institution
- Educational Testing Service, Princeton, NJ.
- Peer Reviewed
- F
- Publication Type
- Reports - Research
- Published in
- United States of America
- Sponsor
- Office of Naval Research, Arlington, VA. Personnel and Training Research Programs Office.
Table of Contents
- ED 214 947 1
- ITTLE 1
- SPONS AGENCY 1
- REPORT NO 1
- PUB DATE 1
- DOCUMENT RESUME 1
- TM 820 080 1
- Lord Frederic M. 1
- Standard Error of an Equating by Item Response Educational Testing Service Princeton 1
- Va. Personnel and Training Research Programs Office. Nov 81 N00014-80-C-0402 1
- ETS-RR-81-49 1
- EDRS PRICE 1
- DESCRIPTORS Comparative Analysis Equated Scores Error Formulas Mathematical Models 1
- Equipercentile Equating Linear Equating Method 1
- ABSTRACT 1
- Reproductiods supplied byEDRSarethe bait that 1
- Personnel and Training Research Programs 2
- Princeton New Jersey 2
- Pre 12
- 3.1 16
