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Peer reviewedLiou, Michelle – Applied Psychological Measurement, 1988
In applying I. I. Bejar's method for detecting the dimensionality of achievement tests, researchers should be cautious in interpreting the slope of the principal axis. Other information from the data is needed in conjunction with Bejar's method of addressing item dimensionality. (SLD)
Descriptors: Achievement Tests, Computer Simulation, Difficulty Level, Equated Scores
Download full textSkaggs, Gary; Lissitz, Robert W. – 1985
This study examined how four commonly used test equating procedures (linear, equipercentile, Rasch Model, and three-parameter) would respond to situations in which the properties or the two tests being equated were different. Data for two tests plus an external anchor test were generated from a three parameter model in which mean test differences…
Descriptors: Computer Simulation, Equated Scores, Error of Measurement, Goodness of Fit
