do you need to include main effects in an spss model how many interactions can be reported in a spss model how do you interpret interaction in spss how to do main effects in log regression do you need interaction for main effect why do I need to have interactions in all variables in the spss model how many interactions are there in logistic regression what is interaction in spss spss how to interpret interaction how can we interpret interactions in a spss model spss main effect what is the relationship between interaction and main effect in spss how to show interaction do interaction effects need to be analyzed in an imputed model when putting an interaction in a model how to identify the interaction how to interpret dummy interactions of two variables why do we not include all interactions in the polon model can an interaction be interpreted as an interaction how many interactions are in a poisson loglinear model what to do if the main effect is not significant