How do we test for moderation?
A. Look at the effect of the moderator variable in a regression in which the outcome is predicted from a predictor and the proposed moderator.
B. Look at the indirect effect of a predictor on an outcome variable via the proposed moderator.
C. Look at the reduction in the direct effect of a predictor on an outcome variable when the proposed moderator is also included.
D. Look at the interaction term in a regression in which the outcome variable is predicted from a predictor, the proposed moderator and their interaction.
Answer: D
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