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Tinsley, Howard E. A.; Dawis, Rene V. – Applied Psychological Measurement, 1977
This research investigated the use of the Rasch simple logistic model in obtaining test-free ability estimates. Raw-score ability estimates were influenced by the difficulty of the items used in measurement but Rasch ability estimates were relatively independent of the item difficulty. (Author/CTM)
Descriptors: Equated Scores, Higher Education, Individual Testing, Item Analysis