thank you!
I also want to test the Group x Rating effect separately at each time point. For this purpose I am using the glfCode option - for example at the first time point I use the symbolic coding:
-num_glf 2 -glfLabel 2 vbias_group_time0 -glfCode 2 group : '1*Group1' '-1*Group2' time : '1*Time_0' vbias : \
Is this method the advised way of testing the between subjects interactions (which includes on continuous variable) at each level of a single within subjects variable?