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Holland, Paul W.; Wainer, Howard – Applied Measurement in Education, 1990
The attempt by D.Edwards and C. B. Cummings to adjust state mean Scholastic Aptitude Test Scores for differential participation rates with a "fuzzy truncation model" satisfies three criteria the authors previously defined but falls short for two. Omission of sensitivity studies mars the otherwise exemplary study. (SLD)
Descriptors: College Entrance Examinations, Criteria, Higher Education, Participation
Peer reviewed Peer reviewed
Wainer, Howard – Journal of Educational Statistics, 1986
Between 1980 and 1984 SAT scores rose 8 points for whites and 15 points for non-whites, but the overall mean increased only 7 points. This article explains that this is not an arithmetic error, but an example of a statistical phenomenon called Simpson's Paradox. It describes how to avoid it. (JAZ)
Descriptors: College Bound Students, College Entrance Examinations, Ethnic Groups, High Schools
Wainer, Howard; And Others – 1991
It is sometimes sensible to think of the fundamental unit of test construction as being larger than an individual item. This unit, dubbed the testlet, must pass muster in the same way that items do. One criterion of a good item is the absence of differential item functioning (DIF). The item must function in the same way as all important…
Descriptors: Definitions, Identification, Item Bias, Item Response Theory