Document (#13564)

Author

Lang, W.S.
Grigsby, M.

Title

Statistics for measuring the efficiency of electronic information retrieval

Source

Journal of the American Society for Information Science. 47(1996) no.2, S.159-166

Year

1996

Abstract

The relationship between 2 dichotomously categorized variables distributed on an underlying continuous distribution is a tetrachoric correlation. This statistic was described at the turn of the century by pEARSON: It is a special case of a Pearson r and may be considered as an estimate of the product moment correlation. There are a number of ways that a researcher could use this statistic in a research design to measure information searching efficiency. Describes and illustrates the use of the tetrachoric correlation for experimental research and hypothesis testing of the efficiency of computerized information searching

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