what is the correlation between the main effect and interaction? what is the main effect in the mixed model is std the main effect in a mixed model when is a main interaction significant how to interpret the main effect of a mixed model when the main effect of x and y is significant what is the difference between main effect and interaction in mixed models is x a significant interaction difference between the main effect and interaction which std is the main effect what is the main effect of interplay if two variables are mixed, which one is the major effect of the interaction? what is the main interaction in a mixed model? what is main effect in a mixed model for a study when std error is significant, the main effect is what is the main effect of x why are the interactions between the main effects and the interaction not significant? is the main effect of x and y a negative binomial error why the main effect of each interaction is not significant if x is significant in a mixed model, why do we assume that y is not