On the Mean and Variance of the Tetrachoric Correlation Coefficient
- 1 September 1977
- journal article
- Published by Cambridge University Press (CUP) in Psychometrika
- Vol. 42 (3) , 347-355
- https://doi.org/10.1007/bf02293655
Abstract
Estimates of the mean and standard deviation of the tetrachoric correlation are compared with their expected values in several 2 × 2 tables. Significant bias in the mean is found when the minimum cell frequency is less than 5. Three formulas for the standard deviation are compared and guidelines given for their use.Keywords
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