ERIC Number: EJ782581
Record Type: Journal
Publication Date: 2008
Reference Count: 10
A Discussion of Population Invariance of Equating
Petersen, Nancy S.
Applied Psychological Measurement, v32 n1 p98-101 2008
This article discusses the five studies included in this issue. Each article addressed the same topic, population invariance of equating. They all used data from major standardized testing programs, and they all used essentially the same statistics to evaluate their results, namely, the root mean square difference and root expected mean square difference (Dorans & Holland, 2000). The major premises underlying all of these articles are that population invariance is a prerequisite for equating, and lack of population invariance can be taken as evidence that a linking is not an equating.
Descriptors: Testing Programs, Standardized Tests, Equated Scores, Evaluation Methods, Sampling, Data Collection, Item Response Theory, Gender Differences, Multiple Choice Tests, Racial Differences, College Entrance Examinations, Law Schools, Geographic Location, Science Achievement, Achievement Tests
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Publication Type: Information Analyses; Journal Articles
Education Level: Higher Education
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