I am using lmer in R to run LMM. My DV is continuous and my IVs are categorical. Many statistician said if the three-level parameter is significant, I cannot interpret the two-level parameter. Does it also include when the parameters are not contradict to each other too?
For example, in the two-level, Group2:color2 is significant, but in three-level, Group2:color3:male is significant. Does it mean that I can interpret both levels as they are not contradict to each other, i.e. The first one is telling me that group2 and the other group is different in color2 than the baseline color, whereas the second one is telling me that the effect of group2 and color3 is higher in male compared to female. Or should in just ignore the two-level interaction regardless of whether than they contradict to each other or not?