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Before SPSS 20.0, if you would like to conduct a multilevel modeling analysis for a categorical dependent variable, that variable needs to be binary or nominal. The current SPSS 20 includes the ordinal response variable. In other words, in addition to multilevel binary logistic regression and multilevel multinomial logistic regression, SPSS 20 can also perform multilevel ordinal logistic regression analysis now.
The above analyses can done through the GLMM procedure (Generalized Linear Mixed Models).
A new book, "Multilevel Modeling of Categorical Outcomes Using IBM SPSS", will be published in the coming April soon.
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