The coefficient on XZ (i.e., aXZ5) indicates the extent to which the relationship between X and M varies across levels of Z. In the final step, most studies add M to Equation 1,yielding the following equation:
The coefficient on XZ (i.e., aXZ5) indicates the extent to which the relationship between X and M varies across levels of Z. In the final step, most studies add M to Equation 1,yielding the following equation: