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Applebaum, Wayne R. – 1979
The Rasch model was used to compare the grade equivalent scores which students of equal ability would have obtained, had they taken different levels of the Iowa Tests of Basic Skills (ITBS). Raw scores on items common to levels 9-14 of the ITBS (vocabulary subtest) were obtained from 6,000 students in Dallas, Texas. Rasch scales were used to…
Descriptors: Academic Ability, Achievement Tests, Educational Testing, Equated Scores
