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Direct linkYi, Qing; Harris, Deborah J.; Gao, Xiaohong – Applied Psychological Measurement, 2008
This study investigated the group invariance of equating results using a science achievement test. Examinees were divided into different subgroups based on the average composite score for test centers, whether they had taken a physics course, and self-reported science grade point average. The reason for dividing examinees into subgroups using such…
Descriptors: Grade Point Average, Science Achievement, Academic Achievement, Physics
Peer reviewedSchulz, E. Matthew; Kolen, Michael J.; Nicewander, W. Alan – Applied Psychological Measurement, 1999
Developed a procedure for defining achievement levels on continuous scales using aspects of Guttman scaling (L. Guttman, 1950) and Item Response Theory. Using data from high school mathematics tests for about 6,000 students, found the new procedure to have higher reliability, higher classification consistency, and lower classification error than…
Descriptors: Academic Achievement, Classification, Estimation (Mathematics), High School Students
