Abstract
There are some approaches to an understanding of the relationships among many qualitative variables.
Depending, among them, specifically upon L.A. Goodman, this paper aims at analysing the interactions in dichotomous and polytomous variables on the basis of different to kinds of the following data :
(1) Four-way table concerning teachers' attitudes in Wakayama.
(2) Three-way table concerning the subscription to a newspaper.
As the result of the above analyses, this paper can offer the following advantages of the Goodman-model : his model is the multiplicative form and usually fitter for data than the additive form ; in addition, compared with the usual models, the Goodman-model makes it easier to calculate not only the main-effects but all the interaction-effects among the variables. This can be said even if variables increase in number.
Goodman, however, assumes that the magnitude of the effects of one variable upon the other is equal to the one in a reversed case. But if the magnitude in two directions are considered to be different, then the Goodman-model will have to modified, and we shall need to develop a new model.
