Change search
ReferencesLink to record
Permanent link

Direct link
Systematic equating error with the randomly-equivalent groups design: An examination of the equal ability distribution assumption
Umeå University, Faculty of Social Sciences, Department of Educational Measurement.
University of Massachusetts.
2008 (English)Report (Other academic)
Abstract [en]

In this study the equal ability distribution assumption associated with therandomly-equivalent groups equating design was investigated in the contextof a selection test for admission to higher education. Test-takers’ scores onanchor items from two subtests were estimated using information abouttest-taker performance on the regular subtests. The results showed that theestimated anchor test scores varied sufficiently so that the equal ability distributionassumption could be questioned. Consequently, we call for morecaution when applying the randomly-equivalent groups design in the equatingof tests. Equal ability groups is a convenient assumption to make but itcan lead to systematic bias in the equating of test scores and this study providesa demonstration of that point.

Place, publisher, year, edition, pages
Umeå: Institutionen för beteendevetenskapliga mätningar , 2008. , 20 p.
, EM, ISSN 1103-2685 ; 61
Keyword [en]
equating error, randomly-equivalent groups design, anchor tests, college admission tests
URN: urn:nbn:se:umu:diva-20426OAI: diva2:208680
Beteendevetenskapliga mätningar, 90187, Umeå
Available from: 2009-03-19 Created: 2009-03-19 Last updated: 2009-09-02

Open Access in DiVA

No full text

Other links
By organisation
Department of Educational Measurement

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 29 hits
ReferencesLink to record
Permanent link

Direct link