# Tetrachoric correlation

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In statistics **tetrachoric correlation** is a method of deriving an estimated Pearson correlation between two dichotomous variables as though they were measured continuously.

## ReferencesEdit

- Drasgow F. Polychoric and polyserial correlations. In Kotz L, Johnson NL (Eds.), Encyclopedia of statistical sciences. Vol. 7 (pp. 69-74). New York: Wiley, 1988.

Harris B. Tetrachoric correlation coefficient. In Kotz L, Johnson NL (Eds.), Encyclopedia of statistical sciences. Vol. 9 (pp. 223-225). New York: Wiley, 1988.