| 释义 |
polychoric, a. Statistics.|pɒlɪˈkɔərɪk|
[f. poly- + χώρ-ισις separation (f. χωρίζειν to separate) + -ic; cf. tetrachoric a.]
Used to describe a table in which data are divided into three or more classes by each of two criteria; of or pertaining to such a table; applied esp. to an estimate of the product-moment coefficient derived from such a table, and to concepts used in obtaining such an estimate.
1918Biometrika XII. 93 (heading) The correlation co⁓efficient of a polychoric table. 1922Ibid. XIV. 149 What we actually desire is to compare the observations and the regression lines as given by the present polychoric method with those obtained by product-moment methods. 1964Psychometrika XXIX. 386 In what follows, the tetrachoric series method is generalized to produce a new polychoric estimate of ρ. |