Logistic regression with categorical IV and moderate relation...

[TaB]

Hello!

I have a little exercice to do for a stats class... And I need some help. (SPSS program)

I have

-1 dicho dependant variable

-4 predictors (all categorical variables of two or 3 groups-that can be use as continuus variable) and 1 control (categorical 3 groups not continuus)

-and I want to do a logistic regression with that, but also had a moderator (categorical 3 groups)

I tried this regression. first Recode new variables for my 3 groups moderator, 0-1 with each group.

I compute interaction variable between my 3 new recode predictors and 1 of my predictor (3 groups but us as continuus...) so three interection variables

First bloc with my controle
Second bloc with all the other V (and my 3 recode moderators)
Third bloc just my interaction variable.


Am I doing something wrong? Is it possible to do something like that?

Thank you for your help!!