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Gao, Rui; He, Wei; Ruan, Chunyi – ETS Research Report Series, 2012
In this study, we investigated whether preequating results agree with equating results that are based on observed operational data (postequating) for a college placement program. Specifically, we examined the degree to which item response theory (IRT) true score preequating results agreed with those from IRT true score postequating and from…
Descriptors: College Entrance Examinations, Student Placement, Item Response Theory, True Scores
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Tittle, Carol Kehr; And Others – Educational and Psychological Measurement, 1975
Provides an estimate of the number of credit hours likely to be earned if college freshmen took the College-Level Examination Program General Examinations (CLEP) and ascertains degree of relationships of scores on each of two CLEP subtests, of performance on an end-of-year achievement test, and of standing on a placement test administered prior to…
Descriptors: College Credits, College Students, English, Equivalency Tests
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von Davier, Alina A., Ed.; Liu, Mei, Ed. – ETS Research Report Series, 2006
This report builds on and extends existent research on population invariance to new tests and issues. The authors lay the foundation for a deeper understanding of the use of population invariance measures in a wide variety of practical contexts. The invariance of linear, equipercentile and IRT equating methods are examined using data from five…
Descriptors: Equated Scores, Statistical Analysis, Data Collection, Test Format