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A Method of Score Conversion Through Item Statistics
Article from Journal - e-Journal
Psychometrika: A Journal of Quantitative Psychology vol. 22 no. 2 (Jun. 1957)
Vol 22 No. 2 June 1957 p.185-188.pdf
A method is presented for converting the scores on one form of a test to those on another form of the same test. The method is particularly applicable to the case where each form has been administered to a different group and the only link between the two forms is a subset of items common to both. The proposed method, called theitem method of conversion, has been applied to several tests for which other methods of conversion are available for comparison. The necessary data are limited to tests for which the total score is the criterion for item analyses. The method gives highly satisfactory results for all the tests to which it has been applied, particularly when the two groups are rather different, in which case the delta method (a different item method) is inappropriate.
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