A discriminant function index for information system evaluation

James L. Carmon

Journal of the American Society for Information Science, 1974, vol. 25, issue 2, 118-122

Abstract: A Discriminant Function Index is proposed for use in the evaluation of information storage and retrieval systems which takes into account the interdependencies between the measured variables and the relative value placed on these variables by the system evaluator. The single number which results, the Index, is proportional to the true value of the individual information system and provides a means of comparing components of individual systems or independent systems. The proposed index is of the form I =b1x1 + b2x2 + b3x3 +…+ bnxn where the xi are measured variables of system performance (e.g., precision, recall, rank recall, log precision, cost, etc.) and the bi take values that will maximize the correlation, rIG, between the index, I, and the true value of the system, G. The prediction of G from the variables is obtained through multiple regression techniques. Application of the index is illustrated through use of data reported in the literature.

Date: 1974
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Persistent link: https://EconPapers.repec.org/RePEc:bla:jamest:v:25:y:1974:i:2:p:118-122

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