Which one of the following centering methods is most appropriate when the researcher wishes to examine the extent to which there is a cross-level interaction between a group and a unit-level predictor?
A) Group mean centering
B) Grand mean centering
C) Either group or grand mean centering
D) Neither group nor grand mean centering

Question

Quizplus · Accepted Answer

When interaction effects (aka moderating effects or cross-level interactions) are the primary concern, group mean centering is recommended as it offers a "pure" estimate of the moderation of the level 2 predictor on the level 1 relationship between the level 1 predictor and the outcome (Enders & Tofighi, 2007).

Which One of the Following Centering Methods Is Most Appropriate