Abstract
In 1933, Chesire, Saffir, and Thurstone published their Computing Diagrams for the Tetrachoric Correlation Coefficient. Since then there have been few developments to aid the practitioner in a rapid and more accurate calculation of the tetrachoric correlation. The present study describes a set of tables for ease in determining tetrachoric correlations. Entries are provided for all X variable dichotomies and their individual Y variable dichotomies rounded to the nearest five one-hundredths in proportion form. The coefficients have been computed to 3-decimal accuracy. The development of the tables in this manner allows the researcher to determine the correlation within a given sample, as well as for populations in which the base rates differ.
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