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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-08-15 and was most recently seen on 2026-08-15.
In statistics, polychoric correlation is a technique for estimating the correlation between two hypothesised normally distributed continuous latent variables, from two observed ordinal variables. Tetrachoric correlation is a special case of the polychoric correlation applicable when both observed variables are dichotomous. These names derive from the polychoric and tetrachoric series which are used for estimation of these correlations.
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