Journal article
A Modified Frequency Estimation Equating Method for the Common-Item Nonequivalent Groups Design
Applied psychological measurement, Vol.33(2), pp.118-132
03/01/2009
DOI: 10.1177/0146621608314607
Abstract
Frequency estimation, also called poststratification, is an equating method used under the common-item nonequivalent groups design. A modified frequency estimation method is proposed here, based on altering one of the traditional assumptions in frequency estimation in order to correct for equating bias. A simulation study was carried out to compare equating errors for the modified frequency estimation method, the traditional frequency estimation method, and the chained equipercentile method. The results show that the modified frequency estimation method performs better than the traditional frequency estimation method and, under most circumstances, also performs better than the chained equipercentile method.
Details
- Title: Subtitle
- A Modified Frequency Estimation Equating Method for the Common-Item Nonequivalent Groups Design
- Creators
- Tianyou Wang - University of IowaRobert L. Brennan - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Applied psychological measurement, Vol.33(2), pp.118-132
- DOI
- 10.1177/0146621608314607
- ISSN
- 0146-6216
- eISSN
- 1552-3497
- Language
- English
- Date published
- 03/01/2009
- Academic Unit
- Center for Advanced Studies in Measurement and Assessment; Psychological and Quantitative Foundations
- Record Identifier
- 9984627348702771
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