Dear all,
I’m running multilevel analyses with HLM and wish to examine an interaction between two level 1 predictor variables. Following recommendations in the literature, I group-mean centered both level 1 predictor variables to ease interpretation. However, I’m left clueless as to whether the respective interaction term (computed beforehand in SPSS) should be centered as well?
If this were the case, would I let HLM center the interaction term, or should I apply some kind of centering method in the process of computing the interaction in SPSS?
Thank you for your time, I would greatly appreciate your thoughts on this.
Linda
I’m running multilevel analyses with HLM and wish to examine an interaction between two level 1 predictor variables. Following recommendations in the literature, I group-mean centered both level 1 predictor variables to ease interpretation. However, I’m left clueless as to whether the respective interaction term (computed beforehand in SPSS) should be centered as well?
If this were the case, would I let HLM center the interaction term, or should I apply some kind of centering method in the process of computing the interaction in SPSS?
Thank you for your time, I would greatly appreciate your thoughts on this.
Linda