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This paper was prepared while the writer was a Visiting Professor at the University Kebangsaan of Malaysia. Helpful discussions with Dr. J. L. Cornette, University of Iowa, and Professor P. G. Herbst, University of Oslo are acknowledged. The opinions are those of the author.
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Keats, J.A. Applications of projective transformations to test theory. Psychometrika 39, 359–360 (1974). https://doi.org/10.1007/BF02291709
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DOI: https://doi.org/10.1007/BF02291709