| 释义 |
tetrachoric, a. Statistics.|tɛtrəˈkɔərɪk|
[f. Gr. τετράχωρ-ος divided into four (f. χῶρος place: see tetra-) + -ic 1.]
Applied to a table in which data are divided into two according to each of two criteria, and so having four subdivisions; 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.
1910P. F. Everitt in Biometrika VII. 438 In the present tables the values of the first six τ functions, henceforth to be termed tetrachoric functions, have been computed for values of ½ (1 - α) from ·001 to ·500 by successive increments of ·001. 1918Ibid. XII. 95 In the ordinary scheme for a tetrachoric table, the quadrants are denoted by a, b, c, d. 1943M. G. Kendall Adv. Theory Statistics I. xiv. 354 Tetrachoric r and biserial η. Both these coefficients are, in effect, estimates of a putative product-moment correlation for data which are not specified with the detail of an ordinary bivariate table. 1956J. Whatmough Language 241 The statistical method of the so-called ‘tetrachoric R’..is valuable in revealing the degree of correlation..between languages which may be suspected of being historically akin. 1964[see polychoric a.]. |